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

Examine the effect of pressure on carbonation in soda.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Learn how different types of soil affect how animal tracks form in this experiment!

This science fair project idea explores the different properties of matter.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

This science fair project idea explores the egg's thin membrane.

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.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

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

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.

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

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.

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

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This classic children's game demonstrates how sound travels through air vs. through a solid.