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Find out whether putting something on top of a plant will inhibit its growth.

Help your child understand surface tension by showing them how they can create a "skin" on top of water.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

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

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

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.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

The goal of this project is to create an exciting topographical map out of dough.

This science fair project idea experiments with spinning color wheels and optical illusions.

Examine the effect of pressure on carbonation in soda.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

In this fun experiment, we'll find out how color affects heat absorption!

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

In this fun activity, your child will create their very own solar oven to bake s'mores!

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

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