Become familiar with ratios and learn how to measure the diameter of the Sun and the Moon in this fun science fair project idea.

This project concerns activity happening millions of miles away, on the sun.

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.

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

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.

Science fair project that determines how UV radiation emitted by the sun varies depending on the time of day, using a handheld UV detector

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.

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

Combine fun sensory play with early number awareness in a squishy sun catcher project. It's a fun way for your kid to learn about numbers.

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.

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

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

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

Help your child improve his coin counting skills in these two math games that have him race to reach $1.00.

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

Competitors go head-to-head only this time it's a race to figure out the lowest common multiple of two numbers; an important step to working with fractions!

First grade math includes lots of work with two-digit numbers. Here's an activity to help kids practice recognizing and sequencing numbers from 1-30.

Make fractions easy for your child to understand by incorporating their discussion and practice into meals and cooking that you two participate in together.

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

In this activity, you child will learn about how heat changes food. On the next sunny day, head outdoors to make a treat in an outside oven! Here's how:

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.

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

The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

Introduce your child to science with something they see everyday--their shadow!