In order to play the interactive games and videos on the site, you'll need the FREE Flash player version 9 or higher.
You can get the Flash player for FREE from the people who make it, Adobe.
If you're having trouble with the Flash player, check out these troubleshooting tips.
You can also see which version of the Flash player you have.
PDFs are documents that can contain text, images, video, animations, links and more. In order to view PDF files you need a PDF reader.
If you're on a Mac running OS X, you already have a PDF reader called "Preview."
If you're on a PC or an older Mac you'll need to download and install a PDF reader, like Adobe Reader.
If you're having trouble with the Adobe Reader, check out these troubleshooting tips.