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

Take a closer look at the soil that surrounds us, and give your child a lesson in Geology 101!

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

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

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This science fair project idea explores how water and ice can change the form of rocks.

This science fair project determines if the allelopathic chemical produced by the black walnut tree biodegrades immediately or persists over several days.

This science fair project idea investigates whether rocks containing geodes can be determined from the outside.

Collect 26 rocks and paint each one with a letter of the alphabet for your very own alphabet rock collection.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

There are hundreds of properties in rocks which you can describe, so get your geology goggles on and get ready to rock your child's science skills.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

Use simple materials to build a "worm hotel" with your kindergarten soil scientist...and see what worms really do all day.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

Examine the influence of the phase of the moon on moisture capillarity in garden soil. Measure and record the depth at which water is first detected.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Check out this fun science project idea on ecological succession and learn the main difference between primary and secondary succession.

Study the impact of environment on seed germination among three materials: soil, paper towel, and cloth. Note when seeds germinate and how well they germinate

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

It's springtime! Time to get outside and dig! Once seeds go into the ground, invite your child to mark the spot in style.

This Thanksgiving cornucopia makes a great addition to any dining table because once youâre done looking at it, you can dig in and eat it!

Dig up some dinos while promoting curiosity and sensory skills in this hands-on activity that will have your child searching for prehistoric treasure!