I looked at these reindeer printable wraps for tp tubes for a minute before running to the bathroom to test my idea. (That's where I could find an empty tp tube, of course!) I measured it, then tested against another brand that of course had slightly different measurements so your mileage may vary.
You do need to be lucky on the intersection of paper sizes (US Letter in my case) and tube sizes, but today I learned you can get four tp tube wraps on a single sheet of paper! I'm thinking of printing some faces, and letting my young artist color to his heart's content! Then my young builder can assemble the village, and peace will reign while they are happily decorating.