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The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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

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

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Test your friends to find out if you can replicate the placebo effect's incredible results.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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 determines whether mass and weight are the same or different.

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

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

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

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.

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.

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.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.