You can download the iso (tinycore-current.iso or tinycore_2.11.iso) and burn it to CD on any box that has the right hardware/software (Windows usually does), and boot Tiny Core from the CD on whatever box you want. This will let you try it out and see what you think. Installing to USB (or hard drive) is a little more involved (I've never done it because the old box I use doesn't boot from USB and has a dead hard drive!).