My children love stickers and recently I came across a site done by an OT that talked about different activities. One of the posts was about how she goes and puts stickers on her clients and the clients get to take them off. This probably wouldn't be a good thing for a child with laytex or tape sensitivies but for those who aren't it allows the kid to move in various ways. If you put the stickers in hard to reach spots then you make them stretch more so than they might normally.
(For kids that are unable to physically reach various parts of their bodies easily this can be a task that might encourage them to reach just a little bit farther. It is especially helpful for kids that might need exercise to help bring their foot closer to them to put on socks or shoes.)