I thought it was Dance of the Sugar Plum Fairy when I thought of it, but that isn't it. It sounds like it should be Tchaikovsky or someone similar, though. Maybe even from the Nutcracker. Does anyone know? I know this is well-known but I couldn't think of the name to save my life.
I played the bit I have in my head using Keybored. Rhythm is a bit off as I'm not used to playing a "keyboard" like this one.