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

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

This cool physics demo illustrates the simple harmonic motion of a pendulum while teaching kids the important concepts of potential and kinetic energy.

This science fair project idea sheds some "light" on which color of candles burn the longest.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

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

Kids will make a homemade electroscope and explain how it detects static charges through induction in this fun science fair project idea.

Determine whether fresh vegetables have more calories or less calories than canned vegetables.

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

What's the difference between centripetal and centrifugal force? Students find out by seeing both in action as they conduct this experiment.

This science fair project idea investigates food preference of birds.

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.

The purpose of this science fair project is to investigate which food wrapping works best to keep refrigerated and non-refrigerated foods from spoiling.

Explore joule heating and resistance vs. temperature with this cool electricity science fair project that gets kids melting ice cubes with resistors.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

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.

Use a fish tank to simulate a pond! This science fair project explores the relationship between acid rain and the dissolved oxygen concentration of water.

Determine the efficiency of multi-tasking by comparing how long it takes students to complete different tasks. Collate data, complete Summary Chart.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Construct calorimeter and determine the caloric value of a sample of foods by change in temperature for each of the foods.

The objective of this science project is to determine whether the brain first processes colors, shapes, or words when given conflicting messages.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This science fair project idea raises awareness of a real ecological issue.

A cool physics science fair project idea for 7th grade exploring the application of distance, velocity, and time equations.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.