A little research reveals that Right Time made a few different hammer toys, but this is definitely the best! The hammer is long gone, but a finger or any sort of mallet will do to punch down "tearful", prompting "cheerful" to pop up! Very satisfying, and to my eye a pretty fantastic object. I haven't find another like this for sale out there anywhere--because really who would ever part with one?
5" w x 4" t (4 7/8" with one head fully up!) x 1 5/8" d. Much hammered and thrown around but all the better for it--works and looks great.