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.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

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.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

Make sourdough bread...and learn some colonial history and modern science in the process!

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

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

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

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.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

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

This year on Mother's Day, try this gift project that brings together an appreciation for gardening with a hands-on lesson in art history.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

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.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

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.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Help your child build her very own science laboratory at home for experiments and science projects. This is a quick, easy, and fun educational tool!

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.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

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.