This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

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

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

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.

Science fair project that helps visualize how the human brain functions by constructing a model of a brain.

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

Learn about the right-hand rule for magnetic force! Use a cathode ray tube in this physics experiment to see a magnetic field's effect on an electron beam.

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

This science project involves comparing the relative effectiveness of salt, pepper and dehydration in food preservation.

Look for correlation between pH values of commercial soaps and detergents and manufacturer claims about eye irritation hazards.

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

This science fair project idea produces sounds by creating vibrations using different objects.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

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 project, you'll create Oersted's experiment, which relates to how electric currents create magnetic fields.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

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.

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

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

This fun science project explores the climate change over the course of the history of Earth and helps construct a diorama representing a geologic time period.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.