Baby o and mommy O

Nonno is visiting (and posting this) and has been reading Tomie DePaola's MOTHER GOOSE with Eddie.  Yesterday we were looking at the cover, where the author's name arches over the top in lower case letters and 'MOTHER GOOSE' under it all in upper case in such a way that the o of 'Tomie' is directly over the O of 'MOTHER' and the o of 'DePaola's' is over the OO of 'GOOSE.'   Eddie points to the first and says, "Baby o and mommy O" and then when his attention is drawn to the second, he says, 'baby o and mommy and papa O."  It turns out that he knows the letters of the alphabet already.