In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

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

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

Using a toy race car kids create a visual model of the Doppler Effect.

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

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

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

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

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

This classic children's game demonstrates how sound travels through air vs. through a solid.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

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

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

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

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

This science fair project idea investigates whether air has mass and weight.