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Rainbow in a Jar Density Experiments

Have you ever tried making a¬†Rainbow in a Jar project? If you haven’t tried this classic¬†density experiment, I’m going to show you how easy it is to make with a few common household items! This¬†rainbow science experiment¬†is so pretty and will amaze your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. Try this¬†rainbow experiment as part of a weather theme, St Patricks Day activity, a¬†rainbow theme or a¬†spring activity for kids.

Have you ever tried making a Rainbow in a Jar project? If you haven't tried this classic density experiment, I'm going to show you how easy it is to make with a few common household items! This rainbow science experiment is so pretty and will amaze your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. Try this rainbow experiment as part of a weather theme, St Patricks Day activity, a rainbow theme or a spring activity for kids. 

Rainbow in a Jar

Get ready for a WOW spring science experiment for kids of all ages! This Rainbow in a jar experiment is a great way to teach density for kids in a meaningful and memorable way! Use this rainbow activities for preschoolers, toddler, kindergartners, grade 1, grade 2, grade 3, grade 4, grade 5, and grade 6 students. Just grab a couple simple kitchen items, a jar, and get ready to create a BEAUTIFUL rainbow in a bottle! This density rainbow is a fun spring science.

Before we dive into this must try science experiment for kids, you need to understand what density is. Basically density i s how tigh the molecules are in a substance. If you dive into a ball pit with just a few balls you will sink down because you are more dense than the items in the ball pit. But, if the ball pit is jammed pack full, you may only go part way or lay across the top. The balls are more densly packed than you are.  In this density experiment for kids we will visually see how some items like corn syrup and honey are more dense, think about how S-L-O-W-L-Y they flow, than say water.  Ready to try?

make your own density jar science experiment at home

Density Experiments

To make this stunningly beautiful rainbow science all you need is a few common materials you probably already have on hand:

  • clear jar
  • red, blue, green liquid food coloring
  • honey
  • blue dish soap
  • water
  • extra virgin olive oil (looks yellow)
  • rubbing alcohol

density rainbow

Rainbow in a Jar Experiment

Start off my mixing in a container  about 1/3 cup honey, one drop of red food coloring, and one drop of blue food coloring. Stir to make a purple color liquid. Now carefully pour the most dense liquid into a clear glass or plastic container. Take care not to get it on the side of the container as it will not look as cool

Rainbow Science Experiment

Rainbow in a Bottle

Add in a good layer of blue dish soap. Again, the trick is to pour it VERY slowly to not mix up the food coloring at the bottom or it will mess up the colors. You can also use a pippette or turkey baster to slowly put the liquid exactly where you want it so it doesn’t run down the side of the jar.

Rainbow Experiment

Rainbow Experiment

In a seperate container mix water and green food coloring. Carefully add the green liquid to your density jar. If you don’t have a pipette, tip the jar so the liquid runs down the side of the jar VERY slowly.

Rainbow in a Bottle

Rainbow Science Experiment

Wait a few minutes to make sure your layers are settled and then add a layer of olive oil. Again, be very careful when pouring in the liquid so the colors don’t mix. Although the liquids would settle to the same spot, the food coloring would all mix together and make brown – not so pretty.

density experiments

density rainbow

Finally mix rubbing alcohol with red food coloring in a small container. Now carefully pour the red liquid into the density jar. Again go slowly or the food coloring will mix together and you wont get a pretty rainbow. The rubbing alcohol is the least dense liquid in your density in a jar experiment.

Have you ever tried making a Rainbow in a Jar project? If you haven't tried this classic density experiment, I'm going to show you how easy it is to make with a few common household items! This rainbow science experiment is so pretty and will amaze your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. Try this rainbow experiment as part of a weather theme, St Patricks Day activity, a rainbow theme or a spring activity for kids. 

Density Tower

Isn’t this spring science project so fun! I love seeing the kids faces when they watch it all come together and the concept of density clicks! Plus you’ll love that this St patricks day science experient is so easy and uses common items you have around your home already!

Helping children gras the concept of solid liquid gas for kids is tricky - students learn best by seeing and touching and you can't do either with gas. This states of matter for kids project allows you to EASILY introduce  the 3 states of matter for kids using balloons! This solid liquid gas kindergarten, pre-k, first grade, 2nd grade, 3rd grade, 4th grade, and up is perfect for summer learning, science lesson, and more. WE've also included a wy to turn this into a density experiment for kids as well!Plus don't miss the printable states of matter worksheet pdf to explore the concept further! two simple water cycle activities to help you teach about water cycle for kids. These science projects help you teach your littles all about the water cycle on the earth. Start with the water cycle experiment which provides a great way to see how water turns to gas and back into a liquid again. Then try our water cycle craft to help kids to reinforce the water life cycle. These are both fun ways to learn about the water cycle for kindergarten, pre-k, first grade, 2nd grade, and 3rd grade science.   There are quite a few activities that can help teach children about density, but nothing as simple as this printable density activity. This fun Cookie Jar solid liquid gas worksheet will help children understand the difference between that states of matter Solid, Liquid and Gas in just one afternoon. This states of matter worksheet is perfect for elementary age students in grade 1, grade 2, grade 3, and grade 4. Looking for a really fun and memorable science experiment for kids? You will love these EPIC pop rocks experiment. Try this pop rocks science experiment with preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th grade students to try a simple chemical reaction. This Whether you try this pop rocks science experiments for homeschool science, at a science birthday party, or as part of a summer science project - this is a MUST try,  really cool science experimentkids will LOVE.

Solid liquid Gas examples for kids

Explore states of matter further with these fun projects:

st patricks day printables rainbow letter matching pot of gold letter find st patricks day worksheets march-color-by-letter-for-kids

Free St Patrick’s Day Printables

Looking for more fun, free saint patricks day printable ideas and activities for March? You will love these free resources for toddler, preschool, and kindergarten age students.:

If your kids love slime - they are going to flip over making Rainbow Slime! Use this rainbow activity for kids as part of your next rainbow theme for spring or summer. This colorful slime recipe is also a really fun St Patricks day activity, a weather activity, or a color theme too!   Toddler, preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade and 4th grade students will love this rainbow art ideas. Just follow our simple rainbow slime recipe and we will show you how to make rainbow slime. Looking for a quick and easy spring craft for kids? You will love this beautiful tissue paper rainbow craft! This simple craft is perfect for toddler,  pre-k, kindergarten, and first grade students! All you need are a few simple materials and you will love a really pretty preschool rainbow craft. Use this spring craft idea to celebrate springtime, st patrick's day activities for preschoolers, summer craft, or anytime you want to brighten up your window with a pretty suncatcher craft. Kids are going to be wowed and amazed as they learn how to make rainbow crystals in this fun rainbow activity for kids! You can quickly and easily grow your own crystals with these fun spring activities for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, and 5th grade students.  This borax crystals science project is perfect for celebrating spring, as a St Patricks day activity, or a rainbow activity for preschoolers.

Rainbow Activities for Kids

Looking for more fun rainbow activity ideas? Check these out!

FREE-Lucky-Leprechaun-Factors-Game St patricks day i spy pot of gold st patricks day math printables

St patrick’s day printables

For elementary age students, check out these fun, hands-on printable activities for St Patricks Day.

This super cute Shamrock craft is such a fun, easy-to-make st patricks day craft to make in March. All you need are a few common supplies like yard for this st patrick's day activities preschool, toddler, pre-k, kindergarten, and first graders. This happy shamrock is sure to be a favorite shamrock art projects idea. Looking for a really fun and easy-to-make shamrock craft? This cute St Patricks Day Art project uses a template to make this st Patrick's day preschool craft simple enough for toddler, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders too. All you need is black glue and colorful sharpie markers to make a truly beautiful four leaf clover or rainbow suncatcher craft. Simply print pdf file with st patrick's day printable and you are ready to get crafty! Get ready for a REALLY fun st patricks day activity with this gold slime! It is super quick and EASY to make this gold glitter slime that looks so cool as it oozes, stretches, and drips. Use this outrageously FUN st patrick's day activities for toddlers, preschoolers, kindergartners, grade 1, and grade 2 students! But watch out or sneaky Leprechauns may try to steal your gold!

St Patrick’s Day Activities

Looking for some cute St patricks day crafts¬†or clever¬†st patricks day activities, don’t miss these fun ideas:

Or take a peak at this weeks worth of activities in our St Patrick’s Theme , this St Patrick’s Day theme Preschool, or all our ideas to celebrate with st patrick’s day activities for kids of all ages!

With 2 simple ingredients you have in your kitchen you can quickly and easily make your own plastic milk! Kids are going to be super impressed with this fun, hands-on Milk Plastic project! With this very simple science experimentfor kids, you can turn milk into plastic! This milk and vinegar experiment is perfect for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th graders too .Simply print pdf file with milk and vinegar experiment worksheet and you are ready to start this fun science experiment with milk! Have you ever heard of a lemon volcano? Kids are going to love this fun, creative,volcano experiment that screams summer! This simple lemon volcano experiment is perfect for curious kids from toddler, preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders too. All you need are a few simple materials to make some amazing erupting lemon volcanos! WOW your kids with this Watermelon Volcano! This summer activity for kids is a great way to sneak in a science experient. Kids are going to love this crazy cool bouncy egg experimert! Children will be amazed by this egg experiment where they will literally dissolve the shell of a raw egg to create a bouncy egg. This bouncy egg vinegar project is fun for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th grade students. Plus our version of this egg in vinegar experiment has a fun, colorful twist!

Food science experiments for kids

Use items commonly in your kitchen to try these food experiments for kids, but note they are NOT all edible!

Have you ever tried making a Rainbow in a Jar project? If you haven't tried this classic density experiment, I'm going to show you how easy it is to make with a few common household items! This rainbow science experiment is so pretty and will amaze your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. Try this rainbow experiment as part of a weather theme, St Patricks Day activity, a rainbow theme or a spring activity for kids.  Looking for a really fun and memorable science experiment for kids? You will love these EPIC pop rocks experiment. Try this pop rocks science experiment with preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th grade students to try a simple chemical reaction. This Whether you try this pop rocks science experiments for homeschool science, at a science birthday party, or as part of a summer science project - this is a MUST try,  really cool science experimentkids will LOVE. Candy science is a fantastic way to demonstrate scientific principles using something kids love, candy! With these simple Colorful Candy Science Experiments, the biggest challenge is not eating all of your science supplies. These easy science projects are perfect for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students.

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com

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