Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

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

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

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

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

This fun elementary school science fair project idea helps students in designing an amusement park using their knowledge of forces and simple machines.

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

In this science fair project, students determine whether a bean plant grows faster and taller using a traditional soil planting method or hydroponic method.

Build a magnetic linear accelerator using a ruler, neodymium magnets, and small metal balls in this fun science fair project exploring magnetic propulsion.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

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

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.

The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

This science fair project idea quantifies the effect of weather- in this case temperature and humidity- on musical instruments.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Science fair project that models the subterranean movement of water, using Darcy's Law. How can this information be used in hazardous material spills?

Discover if soda geysers will erupt when using regular vs. diet cola and which candies will create eruptions.

The goal of this science fair project is to demonstrate magnetic forces of attraction and repulsion using a magnet and everyday objects.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

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