This science fair project idea determines whether eating before or after exercise is more beneficial to health and performance.

Observe which kind of fresh long-stemmed flower will last the longest after being picked.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

To help your child shake the big number blues, here's a handy strategy to make your child a place value pro!

Race to double numbers in this competitive card game. Try one-digit or two-digit numbers, or more!

Start by writing an acrostic poem, but then get ready for a writing challenge that makes an acrostic trickier to write.

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

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.

Challenge your high school student to find the flaw in this short mathematical proof that one is equal to two.

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

Does your child need counting help? Here's a simple game that kids can do at home to help them practice counting to two-digit numbers.

This science fair project evaluates if and how eating a large meal affects ability to perform mental tasks.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Compare different remedies for cooling the mouth after eating spicy food.

This project is about after-images and what possibly affects them.

Sharing can be a challenge, and division doubly so! Practice halving numbers in this competitive card game.

This experiment examines if space objects become round after reaching a certain mass.

Never lose your glasses again after this fun craft project, making a homemade case for your eyeglasses!

This project determines how much the rebound rates of tennis balls change after ten games.

Light up your home with this lightning bug craft that will keep glowing even after summer's gone!

Assess physical and mental states of subject before and after drinking coffee. Compare initial expectations with their reported conditions.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Engage your third-grader in this version of the classic game and she will get lots of practice using mental math to solve addition and subtraction problems.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

Carrots are packed with lots good healthy stuff and your child can transform them into something to enjoy for breakfast or after school!

After the party and presents, there's just one more thing for your child to do: thank you notes!

This game reinforces the meaning of the term "multiples" and is fast enough to hold the attention of your fourth-grader.

Your children will squeal with delight when they discover all the mishaps that come about after a visit from the leprechaun.

For a fun activity that will have lasting effects, make this time capsule with your high school child, to be opened after college graduation.

Help your child learn healthy eating habits by transforming every kid's favorite food into a healthy, flavorful after-school snack.