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

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 exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

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

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

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

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

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 project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

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.

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

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

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

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

Here's a first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

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

The objective of this science project is to determine the length of time for different seeds to germinate.

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

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This snowman's not abominable, he's adorable! Your child can bring her very own snowman to life while practicing how to create texture.

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

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?