Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

In this math and science activity, help your middleschooler learn about proportion and measurement with just her shadow and a tape measure!

Research different measurement systems, design your own new or improved system that can measure something difficult to measure with traditional systems.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

This experiment will examine and precisely measure the amount of sugar in various sodas.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Science fair project that measure winds speed, temperature, and time of day in order to determine the origins of the wind.

Become familiar with ratios and learn how to measure the diameter of the Sun and the Moon in this fun science fair project idea.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Measure the porosity of rocks by submerging them in water. Measure how much water each rock "drank," by measuring the difference in water volume.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

This science fair project determines the quality of a given product.

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

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

Measure the speed of the earth's rotation using protractors and meter sticks. This science fair project measures the angle of the sun in relation to earth.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

In this science project, learn about soil porosity and measure the percent porosity of sand, silt, and clay.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Check out this fun science project idea to measure the amount of vitamin C in ripe, half-ripe, unripe and stored oranges.

Plant sunflower seeds , measure height, calculate average height, compare size and weight of heads. Interpret findings in detailed report.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

Read on this high school science fair project idea to get basic information on the process of heat transfer and the conditions under which the transfer occurs.

A math project teaches students to use a clinometer to gauge the height of very tall objects like trees & to think of better ways to measure how high they are.

Examine the influence of the phase of the moon on moisture capillarity in garden soil. Measure and record the depth at which water is first detected.

Thermometers are how we measure temperature, and we've all heard the terms "centigrade" and "Fahrenheit" tossed around, but what do they really mean?

Determine the growth rates of different types of human hair. Ask volunteers to not cut their hair until the end of experiment. Measure hair length.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Test for a correlation between perceived color and heart rate. Using a stethoscope and stop watch, measure the heart rate (beats per minute) of volunteers.