Here's a math activity that uses coin riddles to help your third-grader improve his coin-counting and logical thinking skills.

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.

Help your little builder move up in the world with this recycled cardboard castle that's just the right size for a young king and his loyal stuffed subjects.

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

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

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.

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 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 science fair project idea discovers the effect of (high) heat on animal cells.

Liven up a lesson about graphing by helping your third grader compile a bar graph from his classmates' birthday data.

Fudge is one of very few desserts people make at home that is actually crystalline. What happens when the fudge crystallizes at different temperatures?

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

The Kindergarten Personal Record Book makes measurement fun & active! Kids record their vital statistics from head to toe using unusual tools like paper clips.

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.

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

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

This science fair project idea examines reptile behavior and to determine whether reptiles are more active during warmer temperatures.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

Here is an activity that your kids can make for Mother's Day, a garden pot filled with edible "flowers".

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

This project examines the concentration of dissolved oxygen in water, with and without oil.

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

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.

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

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?