How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Construct batteries that make electricity from fruits with this fun science fair project.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Discover which fabrics shrink the most in the wash and why.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Chemistry isn't just incredible ... sometimes its edible! These crystal lollipops are a delicious introduction to chemistry concepts.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

What happens when colored beams of light mix? You might be surprised.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Learn how to grow an avocado plant indoors with your 1st grader in this hands-on gardening activity.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

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

Learn all about balance and motion as your child designs a corn maze!

Find out which type of sponge holds the most water.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.