Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

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

This science fair project teaches students about wilting and browning of salad greens.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.