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!

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

This science fair project investigates why the number of visible stars changes from place to place.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

Find out which kind of bubble wrap fares best when put in impact.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science fair project idea investigates how color affects temperature.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

This project investigates the affect of storage temperature on microwave popcorn.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea produces sounds by creating vibrations using different objects.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.