Maywa Denki’s Otamatone is the singing note-stem you play by sliding a finger down the neck and squeezing its cheeks to make it wobble. This is that, shrunk to keychain size and cast as PAC-MAN plus Blinky, Inky, Pinky and Clyde, with eleven songs preloaded and the squeeze-for-wah intact. Less expressive than the full-size version — the honest trade for something that clips to a bag.