Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

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.

This project explores what happens to a rubber band when it is heated and cooled.

Learn how to make a paper snowflake with these simple instructions. Help your child learn how to make a paper snowflake with only paper and scissors.

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.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

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!

When your child is itching for a game, consider ditching Hide and Seek in favor of Shape and Seek. Here's how it works:

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

Study the impact of environment on seed germination among three materials: soil, paper towel, and cloth. Note when seeds germinate and how well they germinate

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

Get a leg up on counting concepts with this project where art and math collide.

Tangrams are a kindergarten staple, but now it's time to take them to the next level! Get your child started on geometry with this tangram puzzle.

Make a lei and bring a touch of the tropical lifestyle into your home!

Explore the best way to store popcorn kernels. It examines the impact of moisture and temperature on unpopped kernels.

This experiment investigates if stress alters body temperature.

Boost shape recognition with this matching game where your child will pair up sticks to create simple shapes.

This fun game helps children learn to estimate the most basic unit of time--a minute--without a clock.

Do your laundry and your science project simultaneously! This science fair project investigates whether the color of a garment affects the time needed to dry.

Determine which environment keeps an ice cube frozen for the longest duration. Inspect and record your observations when cubes melt.

This experiment investigates if small changes in your diet can alter your basal body temperature.

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.