To try out linux without partitioning and installing and everything, try knoppix.
You burn it to a CD, put the cd in, and reboot and it runs linux right off the CD. Its useful for playing with linux, and when I deleted a windows system file and couldn't boot windows, I used knoppix to restore the file.
Just make sure you download the english version, im not the only one that got the german by accident
http://knoppix.net/