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Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

This easy at-home experiment is a great way to "see" science.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

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

Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!

This science fair project idea explores whether color affects a person's emotional state.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Have your child kick off their summer vacation by making a miniature water slide!

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

Discover whether a metal will expand under hot water.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

This science fair project explores how osmotic pressure forces water through the root up into the plant.