Science fair project that determines whether mass and weight are the same or different.

This project compares the strength of one, two, and three-ply toilet paper.

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

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

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.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

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 how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

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

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.