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

How do organic materials become soil? This science experiment measures what materials biodegrade.

Engineers in training can get started with this simple wheel-and-axle construction activity.

Is your little scientist up for a rocky challenge? Let them make their own geode rocks using eggs and epsom salts!

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Make edible amber fossils with your second grader to explore the fascinating world of science!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

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

Make all-natural dye from vegetables to create gorgeous homemade play-silks!

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

This Valentine's Day, pair up science and crafting with this simple crystal formation project that's sure to bring a little love into your home.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Explore scientific concepts with this experiment that introduces kids to the scientific method!

This project determines what category of person is most likely to be ticklish.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

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

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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