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.

Is your third grader bombing around on a bike these days? Here's a way to put all that fun time together with some math learning, too.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Boost your preschooler's math and verbal skills by having her participate in simple, fun activities that teach her how to sort, count, and categorize objects.

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

Making candles from old candles is easy. Recycle old candle stubs to make a "new" candle, and teach your child about recycling at the same time!

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

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

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

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.

This science fair project idea measures physical dexterity as a function of temperature.

This Hanukkah countdown craft will help your little one count the eight nights of Hanukkah. Make a Hanukkah countdown calendar with your child.

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

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

Practice counting to 100 independently with this American flag craft project! 

Discover if temperature settings in a fridge make a drastic difference in terms of bacterial growth.

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 engaging, fun, pattern resist painting is inspired by your little one's love of shapes.

Teach your preschooler color recognition using this handy egg carton sorter. She will group objects by color and learn to recognize their names with this tool.

This project commemorates the milestone of completing the first 100 days of school, while giving your child a manipulative to practice counting to 100.

Hone observational skills and introduce the basics of data interpretation with this data gathering activity all about the different colors people wear.

How many steps long is the hallway? Kids put their graph-making skills to work as they make a step map of their own house.

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

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

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

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.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Encourage your kindergartener to investigate and chronicle the weather she observes during the coldest months of the year.

Use empty soda bottles to create a fun bowling set that helps your first grader practice addition skills!