As kids we had all kinds of brightly-coloured 45s including the now deeply un-PC Little Black Sambo (still got the book) and some Thomas Tank Engine stories, also the Gerald Hoffnung story about the bricklayer and one bizarre 45 given to my Dad, a GP, by a medical rep in which a bladder operation was described in fascinatingly graphic terms.
I hardly bought any pop 45s but I think I did buy Another Day by Paul McCartney.