This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

If you find yourself with a pair of kids' rain boots too cute to toss and too worn to wear, try making this fun and easy planter.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Develop a new system for predicting geographic changes. Demonstrate the nature of geographic change. Make logical predictions.

Explore convex and concave objects and how they reflect light.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Science fair project that compares leaf pigments of various tree species. Which tree species do you think will have the most pigments and why?

Science fair project that creates fog using bottles of hot and cold water.

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.

Get a cool science fair project idea for middle schoolers on the effect of adding sugar to the growth of green plants.

Use simple materials to build a "worm hotel" with your kindergarten soil scientist...and see what worms really do all day.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

Examine the connection between temperature and chemiluminescence.

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

Polymers remove oil from contaminated waters. The purpose of this science project is to test the effectiveness of a polymer in cleaning up an oil spill.

What if the shape of the Earth weren't spherical? How does its shape affect our gravity, climate, and tides? Model these questions in this cool project!

The objective of this experiment is to find out if cooked beans grow faster, if at all, than uncooked beans.

This science project allows students to study the psychology of happiness.

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

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.