Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This science fair project idea experiments with spinning color wheels and optical illusions.

Build a bird feeder science craft that brings birds to your yard, and a smile to the whole family's face.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Use pepper and soap to discover some fun facts about the properties of water.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Have your child kick off their summer vacation by making a miniature water slide!

Make an edible play dough with your child to help her develop her sensory and motor skills.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Explore solids and liquids with your young scientist by making gluep, a goopy substance that can behave like both a solid and a liquid!

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

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

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

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

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

In this CD hovercraft science project, students will construct their own DIY hovercraft.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

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!

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Discover how and which salt melts ice the quickest.

This science activity will help your student explore the changes that occur to transform an egg from raw to soft to hard-boiled.

The pinwheel is a simple toy that has been around for years and uses the wonders of the wind to spin it and delight kids of all ages!