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

Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!

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

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Bring a little science to your third grader's Christmas as you test out his sense of smell by exposing him to common Christmas scents found in your kitchen.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

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

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Help your child get to know the least-appreciated of the five senses, the sense of smell, with a smelling station.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

This activity is a great way to teach kids that, to find examples of science in action, they donât need to look any further than their own backyard.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Put your young paleontologist's puzzle-solving skills to the test by having her hunt for dinosaur bones and then assemble them to create dinosaur skeletons.

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This science fair project idea experiments with spinning color wheels and optical illusions.

Explore aromas with your child and help boost her brain power with some fun and interactive science activities.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Your child can help your family pet take a breather, and help herself relax, too, with this soothing activity.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.