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What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Teach your child how butter is created by shaking up cream the old-fashioned way.

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

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

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 experiment tests whether warm or cold water works best in making cut flowers last longer.

Construct and experiment with a periscope using reflected light rays to gather an image.

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

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.