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Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

In this activity, your child will learn how to make a drop spindle with a handy vegetable.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

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.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

The objective of this science project is to investigate patterns in fingerprints among family members.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Is garlic antibacterial? Antimicrobial? Kids find out by using common kitchen equipment and ingredients in this cool and easy microbiology science fair project.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

In this activity, learners will discover how to make a basic water filtration system using common materials found around the house or outside.

This game will help build your child's word bank as she competes with family members for the "Word of the Day" champion title.

This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

The project researches how lubricants affect the mechanical advantage of a pulley.

Help your child learn one of the most beautiful mathematical expressions in nature as she uses the Fibonacci sequence to create a "spiral of beauty."

The purpose of this science fair project is to learn which substance best preserves apples. Learn about enzyme interactions in fruit and scientific processes.

The purpose of this science fair project is to determine whether Green Bags, with or without refrigeration, are most effective in preserving food.

The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

Learn how acid-base catalysis affects enzymes and enzymatic reactions in this science project.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Check out this cool middle school science fair project idea to find the difference between organically grown and commercial brands of foods.