Transform your child's room just like Ben 10 transforms with his special Alien wristwatch. And again, just like Ben 10, transform it back to normal when the youngster decides he prefers sports, cars, or some other unrelated theme. The stickers in this set are completely removable and reusable, leaving no adhesive residue and working just as well as the last time, every time. This is an excellent way to get your son excited about decorating his own space and being creative. These stickers will work on just about any surface, but take care with wallpaper or some delicate surfaces. If in doubt, test in an inconspicuous place prior to applying all the stickers. Also, wait 10 to 15 days after painting before using stickers. Though the paint feels dry, it needs adequate time to ''cure.'' As with any adhesive product, these will work much better on clean surfaces free of dust and the like. Specifically, they will work well on surfaces including but not limited to walls, mirrors, your fridge, laptop covers, tile, glass, lockers, furniture, and automotive surfaces. 29 removable stickers of the whole Ben 10 Team 4 sheets measuring 10W x 18H inches Remove from wall and reposition with ease Leaves no mark or residue on surface Will not work on cinder blocks or textured surfaces Completely repositionable and removable