This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

Determine whether cats have dominant paws. Observe which paw cat uses to reach for treats, feather, and string. Calculate percentage for two paws.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Many substances are compounds of different elements. This experiment combines iodine and zinc to make zinc iodide.

In this experiment two environments will be compared: a room with interior design that uses correct Feng Shui versus one with incorrect Feng Shui.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

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

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

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

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Learn about how we localize objects and beings in space through sound and about monaural auditory mechanisms and binaural auditory mechanisms.

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

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This science fair project idea explores what common compounds can be easily separated out in a centrifuge.

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

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.

Determine how we can separate the components of a solution

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

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Demonstrate that insects observe colors and choose favorites. Place colored pieces of construction paper on a flat, glassy surface, observe bug preference.

Science fair project that examines oxidation, reduction and chemical indicators by testing for the presence of the iodide in salt.

This science fair experiment idea's objective is to understand the general concept of an acid and a base.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

This science fair project idea identifies trees using a dichotomous key.

Science fair project that uses distillation to convert salt water into fresh water.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.