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Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

Hatch a praying mantis egg case in a homemade habitat with your child's help! This is an amazing experiment in science and nature for kids of any age.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

This science fair project idea examines the reason boats are shaped and engineered.

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

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.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This craft is a great way to explore the fascinating world of spiders and their webs as you collect spider webs from around your house with your third grader.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Help your child create a tasty treat that will demonstrate exactly how frogs survive a freezing season.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

This science fair project idea determines what household items are good conductors of electricity.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?