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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 simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

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.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

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?

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

This science fair project idea explores how length affects the weight a bridge can hold.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

How powerful is the reaction between baking soda and vinegar? Find out here!

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

This science fair project investigates why the number of visible stars changes from place to place.

This activity challenges your student to use spatial reasoning and computational thinking to program multiple robots.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.