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

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

In this fun experiment, we'll find out how color affects heat absorption!

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This science fair project idea examines whether boys and girls differ in reflexes.

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.

Make a backbone model to explore human anatomy and life science.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

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.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

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

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

This science fair project idea investigates if fats add to the flavor of food.