Well, seriously, if you "want to keep cost down", you can get a version of Windows 7 and install it on the Machine. Microsoft throws them out for free for students. Conversely, you would then be able to just get your little one a CC subscription or CS6 at student pricing. Your plan really doesn't make any sense, especially since the hocuspocus involved in transferring a used CS4 license (which is all you can buy at this point) simply wouldn't be worth it.
Mylenium