Science Fairs are such a fun way for kids to get some in-depth, hands-on science experience and discover that science is fun! We have found over 35 really cool science fair projects for kids of all ages! These can be used at school, home or as homeschool science projects. Kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, and 7th grade students will have fun with these science project ideas that your child can do by themselves!

Science Fair Projects

• The first one in this list is obvious – no Science Fair is complete without at least one volcano! They’re always a hit, and never get old.
• Kids can learn about floating and sinking, and properties of water with this water balloon science experiment.
• You know how apples turn brown once they’re peeled? Teach your child about the oxidation process
  with this practical engineering challenge with apples.
• For kids who are passionate about animals, let them explore the biology concept of animal cell structure.
• Shrinky Dinks are also a fun way to display what your child has learned about animal cells
  and/or plant cells.
• If the Science Fair occurs in the winter, what a perfect time to create
  your own frost!
• Growing crystals is always a fun one! Don’t neglect the fascinating opportunity to grow your own.
• Cracked eggs can make an interesting place to grow crystals – they look like geodes!
• Play around with exothermic reactions (it’s not scary) and observe rust forming on steel wool with this
  simple experiment.
• Kids can observe “anti- gravity” phenomena and experience the Science of air pressure with a
  couple of household objects: a ping-pong ball and a hairdryer.
• Children who are learning about human anatomy might enjoy creating a model of the
  human ear.
• Got a child who loves engineering, physics, and simple machines? Let them design and build a pulley.
• Your little engineer might also enjoy learning about mechanical energy with this
  experiment that also involves candy.
• Your little scientist who loves electricity will enjoy this
  electronics project that gives them experience with circuits and closed loops.
• Also interesting to young electricians is this
  electromagnetic train.
• Harness electricity by creating your own homemade battery.
• Astronaut dreams can be fulfilled early by letting your youngster create their own DIY
  planetarium constellation projector that displays his/her favorite constellations.
• Colors can be separated through a simple science chromatography investigation, that also ends with a pretty flower for
  display!
  

Science fair project ideas

• Candy is always a great hands-on object to use for any project or lesson – including Science Fairs!
  Take some candy, add water, and observe what happens to the artificial colors.
• Short on time? This solar light project only takes 5 minutes to set up!
• Cohesion, Adhesion, and surface tension are observed in this
  capillary action science experiment that only requires cups, paper towels, and food coloring.
• Your younger children will love learning about the senses and creating Oobleck to experiment with.
• To explore the sense of sight, try this vision science experiment.
• Impress your child who is fascinated with weather with this
  experiment that allows him/her to observe how a weather vane works.
• This really cute “tiny dancer” experiment is a great way to engage your child who loves dance to
  learn about homopolar motors.
• Combine Art and Chemistry with a diffusion
  watercolor art project.
• Your child can make a car out of recycled materials that actually runs. Just use rubber bands to
  “motorize” it!
• Motivate your little cook with some practical kitchen Science – make butter!
• With your help, your kitchen expert can learn about casein and make “plastic” out of milk.
• Playdough is the perfect thing to use to create a model of the inside of the earth.
• Leaves change color every fall, and your child can use this
  experiment to learn and display how it happens.
• Carbonation in sodas can teach children about carbon dioxide and physical
  reaction points.
• Vinegar, baking soda, and water create a
  chemical reaction that makes raisins dance.
• Explore density of different liquid mixtures with this rainbow density Science experiment.
• DIY lava lamps show children that oil and water don’t mix.