This slightly messy, but tons-of-fun tactile activity will cement the idea of the land and water as pictured on maps in your young learner's mind.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

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

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

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Learn about nature by making your own mini moss garden.

In this activity, your kid has your permission to get his socks nice and filthy. In fact, it's a necessity, because those socks are going to make a garden.

It's a rare kid who doesn't like a sandbox. Next time you're out digging, build in some earth science, too.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

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