I so want one of these for my teen space one day. Save some old magazines, set up the the button maker (we got ours from American Button Machines), and occasionally re-up on supplies. A teen volunteer even created step-by-step instructions, with photos!
Adding a small gaming station to the library near the computers would likely be a huge hit. Limit the seating to reduce noise. Mount Gambier Library Teen Young Adult Gaming Area - Could also be used for separate computer stations for teens.