Looking for a project on machines? Get a fun elementary school science fair project idea to design a compound machine using your knowledge of simple machines.

This cool air pressure demonstration has kids break a ruler using only a newspaper and atmospheric pressure.

In this experiment you will use plastic and magnets to test your local soil composition.

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

Use applied math to model orbital eccentricity in this cool science fair project for 7th grade.

This experiment evaluates whether frequent texters have better finger dexterity compared to people that rarely use text messaging.

In this science fair project, students will use methylene blue to study the presence of aerobic bacteria in milk.

In this science fair project, students use the streak test to tell minerals apart from each other.

Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

In this science fair experiment, kids will use the acid test to discover how to tell one mineral from another.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

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

This science fair project idea determines an average personâs ability to use their anaerobic power system over a period of 2 weeks.

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

Use an Elihu Thomson apparatus, also known as a ring launcher, to learn about electromagnetism concepts and the properties of various metals.

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

In this science fair project, students use hot and cold water to simulate what happens when a warm front meets a cold one.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

Formulate a hypothesis and use the scientific method to determine the guess what is hidden in a box. Test abilities of volunteers, without opening box.

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

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.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.