Barbie PC's are VERY expandable. They have 4 USB ports (at least the one I have does), so you can easily put a USB hub on there to have even more ports. I've put USB wiireless adapters, USB NIC adapters on my sisters. I've put a 512mb RAM DIMM in it, and put a better CD-ROM drive in it. It came with Windows 98, but runs fine on Windows XP Home or Pro. It's not a top end box at all, but can be a nice Internet/Wordprocessing computer. There was also a Hot Wheels Computer which had a Blue and Yellow case with Flame stickers on it. Changing out the battery is no big deal. I just did that for my sisters unit. They are old and slow, but I'm sure there are lots of uses for them. Al