The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

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!

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Help your kids fall in love with nature by making a simple clay bird bath. Set it up in your yard and watch the animals venture in for a sip of water.

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

In this design challenge, your child will make a bottle rocket using typical household items.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

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

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Word color association is just a fancy way to talk about the way we connect colors with words.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

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!