How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Science fair project in which you will start a fire from scratch without using matches or a lighter.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

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.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

This science fair project idea identifies clouds as a means of predicting the weather.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

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

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

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

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

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.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

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

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.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.