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Is it a square or a circle? See if you can trick your friends with this zany science project!

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

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

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

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

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

In this project children practice the scientific method while playing with puffy paint.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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 fair project idea explores the egg's thin membrane.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

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

Learn about this simple machine and make a pulley of your own to use for fun science trials.

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

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

Start your toy engines -- this is going to be a fast and friction-filled race!