Byter Leo sent me some images of “Kids Say the Darndest Things”. I don’t know if they’re all real, certainly the writing styles appear to be those of children so I will assume that the notes are genuine until proven otherwise.
Bill Cosby hosted a comedy series, Kids Say the Darndest Things, between 1998 and 2000. The show consisted of Cosby asking young children questions and recording their cute responses. This show was in turn based on Art Likletter’s radio show House Party and television series, Art Linkletter's House Party, which together aired mostly five days a week from 1945 to 1969. Linkletter also released a series of books called Kids Say the Darndest Things.
Some pics of kids writing the darndest things: