Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

How powerful is the reaction between baking soda and vinegar? Find out here!

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea explores whether white light can be separated into different colors.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

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

This science fair project idea explores the egg's thin membrane.

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.

This will encourage your child to utilize their observation skills, develop aesthetic awareness, build artistic drawing abilities and learn about the seasons.

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.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

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

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Test your friends to find out if you can replicate the placebo effect's incredible results.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

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