An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

Your child can use leaves and grass to create his own outdoor art in celebration of Earth Day...all he needs are is the great outdoors and some creativity!

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

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

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.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

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

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

Make all-natural dye from vegetables to create gorgeous homemade play-silks!

This science fair project idea examines which type of insulation holds in the most heat.

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

This easy at-home experiment is a great way to "see" science.

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Is your little scientist up for a rocky challenge? Let them make their own geode rocks using eggs and epsom salts!

This science fair project idea determines the probability of a coin landing heads or tails.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.