Here are some art projects using office stickers. My friend Rebecca who has taken many flights with her children suggested paper and office stickers as a good airplane activity. We tried it on an excruciatingly long flight with our son when he was 18 months old. It was a great idea...Lot's of entertainment and no mess.
Oscar made these "robot people" when he was two and a half or so. (I drew faces on some of the stickers ahead of time so I guess you could say it was a collaboration.)
I think these tags are so beautiful. We use them as tags for presents sometimes but these two beauties have been on our fridge since Oscar made them on that long flight to Italy.