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Check out this cool and free middle school science fair project idea on how to make a solar oven.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This project is about after-images and what possibly affects them.

This science fair project idea investigates food preference of birds.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea explores whether the types and brands of faucet filters are relevant to their performance.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Demonstrate the principle of jet propulsion in this science fair project by building a rocket from household materials.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Find out whether pacing in long-distance running actually acquires for drastic changes in finishing times versus running super-fast at the start.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Examine how the tire treads of a bicycle affect its rolling frictional force. Change tires, test speed performance on different terrains.

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

Kids make an electromagnet in this electromagnetic induction experiment to learn about induction, current, and the right-hand rule.

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

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Using a toy race car kids create a visual model of the Doppler Effect.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

This science fair project idea produces varying pitches of sound.

This project explores whether similar type movie scenes are accompanied by music with similar characteristics.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

This project will explore whether people are emotionally susceptible to suggestions of both humor and sorrow.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Research historic methods of food preservation. Analyze alternative recipes and techniques of food preservation. Document success with photographs.

Study the effect of music on random rote memory. Examine the practical application of music in learning and education.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

People have favorite flavors, but what about ants? Which ant food is the most popular?

Check out this cool science fair project idea to explore short and long term memory and whether there is gender differences in memory.