Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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.

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

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.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

This science fair project idea determines what household items are good conductors of electricity.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

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

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

In this design challenge, your child will make a bottle rocket using typical household items.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

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.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

This science experiment tests if dog saliva can really help heal wounds.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

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