This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

Learn how the focal length of a lens affects a magnifying glass's magnifying power in this cool science fair project idea for 8th grade.

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

This science fair project idea explores how length affects the weight a bridge can hold.

The objective of this science project is to determine the length of time for different seeds to germinate.

Your child can create a special winter headband with the help of some white felt and a length of silver ribbon.

Avoid holiday card clutter by arranging cards into an artfully simple display: pin them to a length of yarn with classic wooden clothespins.

In this activity, have your second grader practice measuring by finding the height, weight, and length of their most treasured toy!

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Research camouflage products and techniques, test quality by timing volunteers. Calculate the average length of time to recognize the subject.

This hands-on activity that involves arranging pieces of yarn will teach your pre-K child the concept of ordering items by length in an interesting way.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Your child can brush up on her math skills by charting the length of time that each candle on the menorah takes to burn.

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.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Invigorate your fourth grader's mind by helping him turn his room into a woven masterpiece using various lengths of material.

Introduce your child to science with something they see everyday--their shadow!

High school students learn about resistance, resistivity, and if copper is the best metal conductor in this great physics science fair project idea.

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.

Transform paper towel tubes into some great binoculars for imaginary playtime!

Here's a quick, kid-friendly intro to some geometry terms, and a fail-safe way to calculate circumference, no matter what!

This science fair project investigates how temperature of a room affects the burn rate of a candle.

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

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

Have a kid who loves to bead, but can't seem to keep them all in one place? Use those loose beads to craft a decorative wind chime.

Make this door curtain to brighten up your home and learn colors and patterns.

Make learning how to calculate surface area easy and fun using this simple hands-on approach.

Share some old school fun with your preschooler with stilts you can make from items found in your recycling!

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Learn about the factors that influence group conformity.