Kids will have fun learning about what floats in water with this fun density for kids unit exploring mass, volume, density, and more with four different fun, science projects for kids. This simple density experiment for kids is fun for preschool, pre-k, kindergarten, first grade, and 2nd grade students. Children will figure out what is less dense than water and they explore this scientific principle!
Density for Kids
Before we can understand why some things float and some don’t we need to understand density! Density is a measure of how close together these pieces are. If they are close together, the object is dense. If the pieces are far apart, the object is less dense as their is more space for air. The best way to understand density for kids is to try a hands-on density experiment for kids. In this hands-on, easy science experiment for kids, children will discover what floats in water. Use this what is less dense than water project with preschoolers, kindergartners, grade 1, and grade 2 students.
What is density for kids
Start out by reading one of these fun picture books to teack kids about density!
Density experiment for kids
Now let kids try floating different objects in a tub of water in this fun density experiments. I suggest using this free printable with suggestions as well as space for kids to write their prediction and the answer.
Density definition for kids
Now ask kids, what is heaviest – a pound of feathers or a pound of gold?
The answer is they weight the same – they both weight one pound.However, the amount of space the feathers take up would be greater as you’d need more feathers to make a pound. The density of the gold is higher than the feathers.
Basically, density is how compact an object is. Put another way,
density = mass of an object (how heavy it is) / by its volume (space it takes up)
Density explained for kids
So what is mass and volume and how does it make things float
Take 3 identical boxes (could be mac and cheese, jello, corn bread, pasta, etc.) and fill them with different things so that they will have different weights.
- the volume (or amount of space for each of the boxes) is the same for each of them
- the mass (weight of each box) is different
Density Activities for kids
What determines if an object will float or sink in a fluid. Help kids understand this principal with these 2 simple experiments:
- Aluminum Foil – Start by only slightly wadding a piece of aluminum foil and try to float it on water. Now make a second ball using the same size of aluminum foil but this time make it into a tight ball and see what happens. The density of the second ball is greater so it will sink more than the first one.
- Ice and Water – Show kids that ice floats. But wait….ice is water? Put water in a paper cup and make a line on the side to show the level of water. Now put the cup in the freezer until freezes. The water expands as it freezes. Now even though the mass (weight) is the same, the volume (space it takes up) is different so the density of the ice is slightly less than the density of water.
Human Body for Kids
- Grab this free printable 5 senses preschool printables to explore the senses of sight, taste, sound, smell, and touch
- Human Body human body playdough mats – lots of choices to learn about various systems of the body including simple for preschoolers, skeletal system, organs, muscles, nerves, and more!
- Teach kids about human cells for kids with hands on activities, free printable reader, human cell worksheets, and more!
- Human Body Printables makes a printable book that teaches students all about their heart, brain, muscles, cells, skin, bones, lungs, stomach, intestines, and bladder
- 4 EPIC Skeletal System Project ideas for kids – using things like pasta, life saver gummies, lego, and more you can learn about the human body in a fun memorable way
- Free Skeletal System Worksheets for Kids – everything you need to teach kids about their bodies!
- Kids will love learning about the ear with this model of ear for school project
Human Body Projects
- Parts of the Brain for Kids Activity with Playdough Brain Model & Free Brain Worksheets for Kids
- Lungs for Kids Working Model and lesson plan
- The Digestive System for Kids Experiment
- Blood for Kids – Actiivty to learn about the Human Body
- Amazing 5 Senses for kids lesson to explore with hands on activities, videos, books, and more!
- Try this Jelly Bean sense of taste activities for preschool experiment.
- How do Lungs Work Human Body Project for Kids
Human Body Experiments
- Human Heart for Kids: 2 Fun Heart Models plus Worksheets
- Kids will be amazed by these eye science experiments
- Huge pack of 5 Senses Worksheets to explore the senses and sneak in some math and literacy activities too
- How do Hands Work – Human Body Muscles for Kids Project
- EPIC, Life-size Human Body Project
- How Long are the Intestines for Kids – Digestive System Experiment
- Bending Bones – Human Body Experiment Removing Calcium for Kids
- How do Muscles Work – Simply Skeletal Muscle Model that works
- See all of our hands-on ideas to make learning about the human body for kids FUN and more creative printable science experiments for all ages
Science for Kids
Looking for lots more fun, science experiments for kids? You’ve GOT to try some of these outrageously fun science experiments for kids! We have so many fun, creative and easy science experiments for elementary age children:
- 100 Amazing Food science experiments – arranged by type of science
- Colorful Capillary action experiment (also known as walking water)
- Amaze kids with these 12 Hands on battery experiments
- 24 Epic Solar system science projects to try this week
- Lots of really cool dry ice experiments to try at home
- Fun Water balloon experiment that explores density
- Easy Candy Water Displacement Experiment
- 50 Fun Preschool science experiments the whole family will want to try
- Easy Rubber Band Car
- Paint Stick Solar System Project Ideas
- Simple Bernoille Ping Pong Ball experiment
- Fun-to-Make Lego Balloon Car Project
- Popsicle Stick Catapult STEM Project for Kids
- EPIC Exploding Snowman Science Experiment for Winter
- Melting Christmas Science Experiments
- Simple Galaxy science project
- Easy and Fun Dancing Raisins
- Learn about weather as you find how to make a weather vane
- Eye opening Eye science experiments
- Easy-to- make Air pressure experiments
- Stunning Chromatography Flowers are so pretty you’ll forget it was as science project!
- How to Make a Lava Lamp – super easy and SO cool!
- 30 Simple machines for kids projects you will want to try
- Easy, fascinating, and colorful project answering why do leaves change color for kids
- Free Printable Animal Classifications for Kids Cootie Catchers
- Amazing POP rocks experiment is one of our all-time favorite science experiments we like to do during the summer are
- 19 Edible science experiments – which delicious project will you try first?
- HUGE Free Solar System for Kindergarten (coloring pages, hands on science projects, worksheets, and more!)
- Pipe Cleaner Constellation Activity (As seen on Good Housekeeping!)
- Teach kids about conductivity with this fun electricity experiment projects
- Amazing, Heat Sensitive, Color Changing Slime
- Life Cycles for Kids (from penguin to sunflower and spider to turkey we have LOTS of life cycles to explore and learn about)
- EASY, Colorful Oil and Water Experiment Worksheets
- 4 Fun Skeletal System Project Ideas
- Kids will be amazed as you change colors of white flowers with this food coloring flower experiment worksheet
- This super cool Lego Zipline is fun and simple to make
- EPIC Life-size Human Body Project w/ free printables!
- Check out this super cool look INSIDE a Volcano Experiment for Kids
- Exploding Watermelon – science experiment that explores potential and kinetic energy with a big WOW moment!
- Lego Electricity Science Experiments
- Marshmallow Shooters STEM Activity
- Find LOTS more EASY Printable Science Experiments for kids of all ages!