Children will love this arts and crafts activity. Write an "invisible" message in white crayon, then paint over it to reveal the secret!

Write a poem with a twist! Your child can write a poem that also has a secret sentence hidden within the words of the poem.

For most second graders, a good secret code is just about irresistible. Here's one that builds math facts while you're at it!

Encourage a bit of mystery and intrigue by teaching your clever kid how to create and use secret codes.

This is the perfect way to send a love note to your favorite Valentine! Your child can decorate a crepe paper bag for a secret message.

Here's a fun arts and crafts activity that has you and your child creating a book with a secret hollow!

Make a periscope with milk cartons and mirrors! This preschool activity is great for playing secret agent and learning simple physics.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

Inspire your fifth grader to explore a new culture and determine her New Year's fortune by playing this German wax dripping game.

To make this unique Valentine's Card, all your child will need is his creative mind, some paper, and a pencil.

Do suds equal more clean or does a sud-free cleaning agent works just as well or even better?

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Explore the role of starches as thickening agents in food, and learn about the chemical properties of starch in the process.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

This project makes young children uniquely aware of their sense of touch and its ability to alone give them information about the world around them.

This easy painting activity feels magical, especially when you use it for a secret message.

These secret code activities are fun, and also provide fourth graders with great opportunities to practice language development and logical reasoning.

Here's a simple math activity that has your child using her basic addition facts to solve a secret code.

Your child will have loads of fun creating this decorative basket and filling it with a secret gift or goodie before sharing with a friend or family member.

What does yeast eat? Sugar, of course. But yeast also has some powerful enemies in the form of antifungal agents! Kids test them out in this fun yeast lab.

Most people throw out soaked tea bags after use, but artists know a secret--tea bags can be a great medium for creating one-of-a-kind modern art.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

Help your child work on her code breaking and writing skills while covertly developing her analytical thinking skills with this fun activity.

Outfit a pair of dark sunglasses with sneaky mirrors for eyes in the back of your head.

Keep your clever kid occupied with this tricky grille cipher.

In this fun, magical art activity, children paint an invisible picture that is only revealed when covered with watercolors.