Make an edible play dough with your child to help her develop her sensory and motor skills.

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

In this science fair project, students create their own miniature salt flats at home.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

This is a fun and inexpensive project and it's a great way for your child to build basic geometry skills, like shape recognition and pattern/angle familiarity.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

This fun elementary school science fair project idea helps students in designing an amusement park using their knowledge of forces and simple machines.

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

Make a backbone model to explore human anatomy and life science.

Make homemade lemonade in a baggie with your preschooler with this fun and easy recipe.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

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!

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

In this science fair project, students make their own rain gauge to measure rainfall.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Make a list of items that need repurposing such as e-waste, batteries and mattresses. Invent your own original repurposed design.

Check out this cool and free middle school science fair project idea on how to make a solar oven.