Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

This science fair project idea deals with the qualities of shade on a sunny day.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

This science project allows students to study the psychology of happiness.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

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

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

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

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

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Science fair project that determines whether mass and weight are the same or different.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.