... 49 keys roll up piano keyboard instruments Material: silicone,foldable/waterproof 6 Demo 10 rhythms 16 tones CE,FCC,RoHS Standard 49 Keys,6 ... roll up piano, which are incredibly cheap and don’t take up any room, because you can roll it up when you finished with it. Roll Up Piano ... when your fingers get tired of playing.This flexible roll-up piano definitely goes in to my wishlistDimension: keyboard 725* ...