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

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Bring the fun of gardening indoors! By stuffing a simple pair of pantyhose with a few grass seeds on top, your child can grow her very own plant pet.

You and your child can create this beautiful butterfly mobile for hanging anywhere in the home (and learn about this magical creature while you're at it).

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

This science fair project idea demonstrates that plants give off water.

Create your very own scented hand sanitizer that will help your child to keep those nasty germs at bay!

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

Grow these wheatgrass and alfalfa friends and watch their hair spring up in just a couple days!

Teach your child about recycling and gardening as she re-uses an empty plastic milk gallon jug to craft a swan-shaped plant container!

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

Set up a fun guessing game for your curious kindergartener, one that will test her ability to use all five of her senses.

Take a nature walk in your backyard or local park to find one object for every letter of the alphabet. Then put them together in this handy nature book.

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

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.

In this hands-on activity, kids learn what it takes to foster seedlings into full-grown plants, all in a regular old soda bottle!

Study science with your first grader in this arts and crafts activity that models the reason why fall leaves change color with some paint and crayons.

In this art project, budding entomologists will create a larger than life, moveable puppet version of a praying mantis.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

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

In this activity, find out who the flowers' "partners in crime" are by being a flower spy!

Your child will create an adorable Christmas tree from their footprint and practice counting while decorating their tree with objects of a variety of textures.

Make scented sensory cloud dough. Add it to a sensory table, activity station, or put it in a baggie for extra at-the-park entertainment!

Recycling may be a confusing concept for your little one, so take the time to teach them the magic of compost - right in your own backyard!

Help your kindergartener identify and sort eight different kinds of common seeds on this "seed wheel" plate you can use all growing season.

Beetles come in many shapes and colors. Here's how your second grade child can create his own beetles to paint and play with!

Introduce your child to the importance of preserving the world's biodiversity by turning a lesson on endangered species into a fun game for the whole family.

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!