This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Check out this fun science fair project idea to learn how alkaline batteries convert chemical energy to electrical energy?

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

This science fair project idea investigates the relationship between memory and age.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

This experiment evaluates whether a personâs dominant hand is more sensitive than their non-dominant hand.

Science fair project that identifies the nature of ionic and covalent bonds and determines how ionic and covalent compounds differ.

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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

Evaluate whether birth order influences personality.

Can playing video games trigger an adrenaline rush even though there's no real danger? In this cool experiment you'll learn all about how fight-or-flight works!

This project explores differences in people's reactions to images in color and images in black and white.

Research long-term effects and draft a questionnaire about frequency of marijuana use and average annual income. Interpret findings in a detailed report

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.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

This science fair project idea compares the mass and density of objects.

Check out this cool science fair project idea to explore the relation between onions and eyes and how to prevent eyes from tearing while cutting an onion.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Use pepper and soap to discover some fun facts about the properties of water.

This science fair project studies whether DSLR and Point-and-Shoot cameras work the same way under all conditions.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

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

Assess physical and mental states of subject before and after drinking coffee. Compare initial expectations with their reported conditions.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.