Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

Science fair project that determines what percentage of air is made up of oxygen by examining the chemical reaction between oxygen and rust.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

Determine whether carpet placed on a lawn will kill grass and weeds. Choose an area of lawn that you would like to remove, record grass that is dead or dying.

This experiment will explore the best way to create a perfect soft-boiled egg.

Science fair project that studies how perfumes are made in order to determine how we can capture a scent.

Have your child kick off their summer vacation by making a miniature water slide!

Take the plunge into handcrafting with this neat and tidy soap recipe. Here's how to create your own personalized soap.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Discover the interactions of synthetic dyes and natural dyes on natural and artificially-made fabrics.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

This science fair project investigates why the number of visible stars changes from place to place.

Research Earthship buildings. Draft a unique architectural design that repurposes used, discarded radial tires. Build scale model of structure.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

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

This science fair project idea investigates how the shape of an object affects drag.

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.

Discover the wonders of simple clay by pressing flowers into a modeling medium!

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

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

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

Science fair project that examines how cell membranes allow the inward and outward flow of materials as demonstrated by eggs.

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.