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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.

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

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

Think you need a special dehydrator to make your own fruit leather? You can actually make a delicious version of this popular kid's snack in your own oven.

Any time is the perfect time to whip up a delicious batch of fluffy pumpkin cookies.

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

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

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.

Construct calorimeter and determine the caloric value of a sample of foods by change in temperature for each of the foods.

Get your child excited about measuring with this fun and easy household measurements activity.

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?

Science fair project that tests how heat affects the chemical reaction between a seltzer tablet and a glass of water.

Help your preschooler grasp the concept of ordering and sequence while teaching him valuable vocabulary with simple activities around the house.

This science fair project idea determines what factors influence an individual's reaction time using a web-based timed reaction test.

Time is an abstract concept that's difficult to grasp. But waiting for the turkey to come out of the oven on Thanksgiving is a concretely yummy experience.

Want a fun way to teach your kid to tell time? Making a plate clock is a great way for him to learn how to tell time in a way he'll actually find exciting.

Challenge your preschooler to a game of shape match-up--an entertaining way to boost her observational ability.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

This experiment works due to a simple principle: plants need light. Build a shoebox maze and watch the plant work though the obstacle course, searching for sun.

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.

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

This Pysanky egg-decorating activity is perfect for young artists. Bring a little color and creativity to any holiday with this traditional Ukrainian craft.

Determine whether the application of Febreeze will lower the bacterial count.

These delicious Easter Basket Cupcakes are a simple, creative holiday treat. These cupcakes sit in waffle bowls with festive coconut grass and jellybean eggs.

The objective of this science experiment is to evaluate the affects of high and low heat capacity on a material's heat retention ability.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

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

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