In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

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

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

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

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Test your friends to find out if you can replicate the placebo effect's incredible results.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

This science experiment tests if dog saliva can really help heal wounds.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

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.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.