This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Discover whether cold or hot water from the faucet will boil faster on the stove.

In this science fair project, students use the streak test to tell minerals apart from each other.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

Is it a square or a circle? See if you can trick your friends with this zany science project!

Test whether plants can grow without sunlight and water.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project idea demonstrates that plants give off water.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

The project investigates how water and movement affects erosion.

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

This classic children's game demonstrates how sound travels through air vs. through a solid.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

In this activity your child will create their very own marble maze!

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.