In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

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

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Give your budding young observers a chance to discover simple machines at use in their own home.

Science fair project that determines whether mass and weight are the same or different.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

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.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

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.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

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

The project determines which laundry detergent is best for cleaning clothes.

This tricky building block challenge asks your learner to think creatively. They will work on their divergent thinking skills as they try to fill up an index card perfectly with building bricks.