This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Want to boost math and science learning? Take a bug expedition and give your first grader practice observing and charting what they see.

Blend science and math to explore a very important first grade social studies question: does our planet contain more land or more water?

Help your child learn science and math skills like sorting, sequencing, and ordering while taking a nature walk and collecting and collaging leaves.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

This first grade science activity is great for winter! Your child will grow and observe her own amaryllis bulb, keeping a journal of her scientific findings.

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.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

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

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

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

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

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.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

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.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.