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 science fair project, young children discover what happens when two fluids that have different densities get together.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This science fair project idea explores how length affects the weight a bridge can hold.

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

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

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

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

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

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

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

This science fair project teaches students about wilting and browning of salad greens.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

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

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science fair project idea investigates how the shape of an object affects drag.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

People have favorite flavors, but what about ants? Which ant food is the most popular?

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.