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

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

Making candles from old candles is easy. Recycle old candle stubs to make a "new" candle, and teach your child about recycling at the same time!

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.

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science fair project idea measures physical dexterity as a function of temperature.

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

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

Any time is the perfect time to whip up a delicious batch of fluffy pumpkin cookies.

How many steps long is the hallway? Kids put their graph-making skills to work as they make a step map of their own house.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

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

Analyze competed scientific studies to determine the effectiveness of ancient remedies. Create a chart that illustrates the effectiveness of these treatments.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

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

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

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

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

Time is an abstract concept that's difficult to grasp. But waiting for the turkey to come out of the oven on Thanksgiving is a concretely yummy experience.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

Dig up some dinos while promoting curiosity and sensory skills in this hands-on activity that will have your child searching for prehistoric treasure!

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

All you need are pencils, paper and some scissors to get started on this easy and fun game to review astronomy information, or other types of study concepts.