When our son, Ryan was young, his favorite book was “Hand, Hand, Fingers, Thumb” by Al Perkins. We read it to him over and over, and over again. It is a fun, rhythmic read.
In fact, it became so embedded into my brain, that anytime the subject of ‘thumb’ is brought up, the line, “Hand, hand, fingers thumb, dum, ditty, dum ditty dum, dum dum,” rolls through my head…and then gets stuck there.