Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

This project investigates the affect of storage temperature on microwave popcorn.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

This project examines what types of objects burn and which burn faster and cleaner.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

Construct and experiment with a periscope using reflected light rays to gather an image.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Discover which fabrics shrink the most in the wash and why.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Find out whether putting something on top of a plant will inhibit its growth.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

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.

Find out which type of sponge holds the most water.

This project examines whether playing music during class helps students learn or if it distracts students from learning.

This science fair project idea explores whether there is a connection to the color a person wears and the way their emotional state is perceived by others.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!