In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This project compares the strength of one, two, and three-ply toilet paper.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

In this fun activity, your child will create their very own solar oven to bake s'mores!

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

Put your young paleontologist's puzzle-solving skills to the test by having her hunt for dinosaur bones and then assemble them to create dinosaur skeletons.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

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

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Do you think heat can affect a plant's growth rate?

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

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!

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

Making your own glass cleaner is easy, effective and inexpensive!

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

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

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.