In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

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

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Get a better understanding of water content by dehydrating carrots.

In this project children practice the scientific method while playing with puffy paint.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

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

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.