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 determines if the color of light affects the growth of plants.

This science fair project idea investigates whether plants can survive being frozen.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Find out whether putting something on top of a plant will inhibit its growth.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.