Make over an old shirt that's destined for the thrift shop with this heart cut-out craft for Valentine's Day.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This activity teaches your third grader how to make a paper cut-out still life, in true Matisse-style.

Stay active over summer vacation with this fun take on the old favorite Red Rover!

The project determines which laundry detergent is best for cleaning clothes.

Here's an activity that takes fourth grade reading and writing skills beyond the classroom to offer a warm welcome to a new neighbor.

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

In this fun art exercise, kids practice seeing multiple shapes and colors inside a water-filled glass and recreate them as a still life using colored paper.

Challenge your fourth grader to try to recreate the geography of her state using just flour, salt, and water.

Help your child construct and author a "sempuyo," a traditional Japanese book with accordion-style pages; she will develop her writing and fine motor skills.

Put old, worn-out picture books to work by constructing a book birdhouse, perfect for welcoming spring.

Do different types of oil mix or stack? Find out in this science fair project idea!

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Teach children how to upcycle dried-out markers with this homemade paint-making activity!

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Find out which kind of bubble wrap fares best when put in impact.

Check out this sweet recipe idea perfect for celebrating Dia de los Muertos.

Find out whether putting something on top of a plant will inhibit its growth.

The goal of this project is to create an exciting topographical map out of dough.

Create a yarn doll out of a few toothpicks and colorful string with this Guatemalan craft.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Get inspired by the great outdoors and help your child make a quirky jewelry tree out of chopsticks!

Find out whether packaged seeds actually do expire in this new science fair project idea.

Kids will get a kick out of shopping for discounted "kicks" with this creative math game that focuses on percentages.

Create cake pops in shaped like eyeballs in this extra sweet, gross-out Halloween baking activity!