Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

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

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Is it a square or a circle? See if you can trick your friends with this zany science project!

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

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Find out which kind of bubble wrap fares best when put in impact.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

In this fun activity, your child will create their very own solar oven to bake s'mores!

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.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

This biodiversity project examines the biodiversity in your own backyard.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

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.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

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.