Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

This science fair project idea explores how length affects the weight a bridge can hold.

Science fair project that cultivates slime mold and monitors the stages of its development.

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

The aim of this science fair project is to study the mathematical construct called magic squares and create a unique magic square puzzle.

With some cookie dough and ordinary household objects, let your kindergartener explore how fossil imprints are made.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Science fair project that helps visualize how the human brain functions by constructing a model of a brain.

Science fair project that examines learn how the angle of incidence affects the efficiency of solar panels. How does a solar cell work?

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

If you're looking for something to keep your kid busy on a warm day, and give him some writing practice in the process, bring on the mud!

Help your little one figure out the differences between the worlds of air, land and water, a huge step in understanding how our environment works.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

Wreath ornaments decorate your Christmas tree and act as a fun sensory craft for preschoolers. Make wreath ornaments with your child this holiday season.

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

Compare the amount of ozone in various locations with this science fair project that will have your kid create her own ozone strips!

This science fair project examines how seeds hitchhike on animals and clothing.

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Here's a guide to starting a community clean-up project from scratch.

The goal of this science fair project was to evaluate the ElectroMagnetic Field produced by Radio Frequency Identification transmitters.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!