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

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

This science fair project focuses on the use of the enzyme amylase found in human saliva to break down starch into sugar.

This science fair project idea investigates the hardness property of minerals.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

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.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

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

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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

Science fair project that examines condensation and the conditions needed in order for dew to form.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea examines which type of insulation holds in the most heat.