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.

Create clear sound shakers so your preschooler can observe and compare the different sounds that objects make!

Race to double numbers in this competitive card game. Try one-digit or two-digit numbers, or more!

In this simple math activity, your young learner will compare two types of Valentine's Day candy using a Venn diagram.

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.

Does your child need counting help? Here's a simple game that kids can do at home to help them practice counting to two-digit numbers.

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

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

Compare and order numbers and introduce mathematical inequalities in this fun math card game.

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

Sharing can be a challenge, and division doubly so! Practice halving numbers in this competitive card game.

Engage your third-grader in this version of the classic game and she will get lots of practice using mental math to solve addition and subtraction problems.

Head out to the driveway, ball in hand, for a bouncing challenge. Then use those results to make a colorful graph that lets your child compare results.

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.

Play with shapes, like triangles and circles, to help your child review the different kinds and create a new picture!

Hone observational skills and introduce the basics of data interpretation with this data gathering activity all about the different colors people wear.

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.