This science experiment has students test whether a snail moves faster on concrete or dirt.

This science project teaches students to classify different shapes of leaves.

Start your toy engines -- this is going to be a fast and friction-filled race!

Using a toy race car kids create a visual model of the Doppler Effect.

Do you think heat can affect a plant's growth rate?

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

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science fair project idea examines the reason boats are shaped and engineered.

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

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

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

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

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

Test your friends to find out if you can replicate the placebo effect's incredible results.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

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

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

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.

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.

This science fair project idea experiments with spinning color wheels and optical illusions.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.