This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Examine the presence of seeds in open fields. Collect seeds on socks by walking through open fields of grass or other growth. Germinate seeds on socks

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

Check out this fun science fair project idea to determine if the size of a particle affect the rate or speed of a chemical reaction.

This experiment works due to a simple principle: plants need light. Build a shoebox maze and watch the plant work though the obstacle course, searching for sun.

Discover if temperature settings in a fridge make a drastic difference in terms of bacterial growth.

Have your child observe, measure and record the amount of space objects occupy, and you'll have an inside space explorer on your hands in no time!

Examine the connection between temperature and chemiluminescence.

Your child can turn cookie dough into a big pile of colorful painted fall leaves ready for eating!

This science fair project investigates how temperature of a room affects the burn rate of a candle.

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

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

The garden is the perfect place to practice math and science with preschoolers. Get digging (and counting, sorting, observing at the same time!)

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

Pumpkin carving party activities are great for a pre-Halloween party. Try pumpkin carving party activities, including jack-o'-lantern ideas and fall recipes.

Science fair project which measures the amount of heat energy released by a burning candle by calculating how many calories of heat it emits.

Determine which metal has the highest rate of conductivity.

This science fair project explores different types of endangered frogs, and why some are endangered while others are not.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

Construct calorimeter and determine the caloric value of a sample of foods by change in temperature for each of the foods.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

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

In this science fair project idea, kids make water dance on the surface of a hot pan with the Leidenfrost Effect.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Topped with roasted pumpkin, prosciutto, herbs, and feta, these pita pizzas are a healthy, seasonal alternative to your classic pie.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

The objective of this science fair project is to examine the cleanliness of salad preparation techniques.