I used to color on the space maker part with Crayola marker. Then I would put Elmer's glue on it and sit it under my desk and wait for it to dry. When I would go to school the next day it would peel right off.
In the you could buy pencil erasers that were scented in all shapes sizes and colours, I had this particular one and it smelt lovely. Scented erasers got banned in the UK because younger kids were tempted to eat them, and risked choking.