What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Find out whether putting something on top of a plant will inhibit its growth.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

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

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

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

This science fair project idea explores the different properties & interactions of sugar molecules.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

This science fair project idea produces varying pitches of sound.

This science fair project will help students learn about non-vascular plants, such as mosses.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Which do you prefer: real or artificial? Try this sweet little taste experiment to help your kids develop a better awareness of the food they consume.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

This science fair project idea investigates if fats add to the flavor of food.

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.