Are you new to GNU/Linux?
Try the Fedora Sugar on a Stick (builds from Microsoft Windows™)
[http:??? ] Mac (OSX) user should try VirtualBox
Are you already using GNU/Linux?
- Ubuntu user: Try Ubuntu SoaS
Do you have an OLPC XO-1?
Update to the latest Sugar here.
Or are you a developer?
Developer tools are here
- Linux Terminal Server
- adding Sugar to your favorite distro...