Find out whether packaged seeds actually do expire in this new science fair project idea.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Challenge your learner to design and build a city of their own in this creative engineering activity.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

This science fair project idea determines if the color of light affects the growth of plants.

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

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

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

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

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

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

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

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

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

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

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

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.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Make a spring collage with your child to get them outside and those creative juices flowing!

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.