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In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

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

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

This project examines the concentration of dissolved oxygen in water, with and without oil.

The objective of this science project is to examine the factors that affect the dispersion of oil in water, including water agitation.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

There are a lot of ways to make decorative wreaths. This wreath uses cloth and egg carton flowers!

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

The objective of this science experiment is to evaluate the affects of high and low heat capacity on a material's heat retention ability.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This kids' activity is fun to perform and impressive to watch. Plus, it's a great example of Newton's First Law of Motion at work.

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.

This Valentine's Day, spend a couple of hours with your child constructing a colorful, spring-limbed "heart man"!

Get estimating with this spooky activity that asks your young mathematician to rely on their problem-solving skills to figure out how many items they believe are in spooky Halloween jars!

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.

What better way to raise awareness about the environment than with an eco-friendly Earth-themed party? Get your party started with this step-by-step guide.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

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

Turn your childâs love of markers into a really colorful creation with the help of some water and a big brush.

Tell the Purim story in a new way: By making a set of puppets out of an old deck of cards!

Hone observational skills and introduce the basics of data interpretation with this data gathering activity all about the different colors people wear.

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!

This writing activity to get your third grader to combine the fun of poetry with the excitement of celebrating a birthday.

This project examines various algorithms to determine the ideal algorithm for a strategy game.

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

Guide your middle schooler through making his own papier-maché witch or wizard puppet. Move over Harry Potter!