How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Make "fossils" with your child to hide in the sandbox or at the park or the beach, to help your child explore his archaeological side.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Discover whether a metal will expand under hot water.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.