37 key Rollable Rubber Keyboard. Power off/Low/Hi Switch. Tempo Up/Down. Demo Songs. 8 Rhythm Selectors. 8 Instrument Selectors. Auto Power off to Save Battery Life. This toy has also been evaluated by National Lekotek Center, a nonprofit organization dedicated to making the world accessible to children of all abilities. Lekotek offers the following additional information: Strike up the band! Because this 37-key rollable rubber keyboard also plays 7 other instruments, including violin, guitar and trumpet. The keys require only a very light touch to activate, offering children who have muscle weakness the opportunity to make music. Choose from 8 rhythm selectors to keep the background beat as your child plays the lead to help heighten self-esteem as he or she creates music that has a real sound. In addition, children can play individual notes using isolated fingers or move their hand along the entire length of the keyboard to hear a full run. And for those who prefer just to listen, the demo button plays an entire song without requiring continuous movement. This portable piano is perfect for pianists to explore their creativity while discovering musical preferences!