Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

This project compares different liquids and the freezing, melting and boiling points of liquids.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

Encourage your child to compare and contrast a wide variety of autumn-themed items by weighing various objects and recording their findings.

Whatever is stacked in your cupboard can be used to help your child learn how to compare fractions and decimals. A great hands-on math lesson!

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.

This measurement activity uses feet to compare objects, but not the ones found on rulers and measuring sticks...the feet on your child's own body!

Cookie catastrophe! In this project you will determine if different types of cookie sheets can cause cookies to bake differently.

Demonstrate the capillary function in plants by adding food coloring to glasses of water. Slice stalks of celery and leafy tops. Compare color of leaves

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

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

This experiment researches if you gave different amounts of food to mosquito larvae would they grow faster or slower

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

Explore this fun science fair project idea to investigate different microclimates in and around your home and their effects on the plant and animal life.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

Fudge is one of very few desserts people make at home that is actually crystalline. What happens when the fudge crystallizes at different temperatures?

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.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

Check out this fun science project idea to explore different types of starches and learn how removing starch affects the quality and taste of food.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.