The U.S. Environmental Protection Agency has designated January as national Radon Action Month, a perfect time for you to protect your family by testing your home for radon. Radon is a colorless, odorless, tasteless gas, so testing is the only way to know if radon is present in your home or school. Test kits are available in home improvement centers, hardware stores and online. They cost approximately $20. The kits are simple to use with easy testing and mailing instructions.