For me this is slightlly from left field as I don't have kids, have never wanted to have kids indeed even when I was one I didn't particularly like kids BUT...that freudian slip out of the way I would have thought that parents with sprogs in tow would have been interested in books with a maritime bent aimed at said anklebiters. I am informed, how reliably I cannot attest to that there is, well was, a fellow by the name of Arthur Ransome who wrote an entire series of books on sailing aimed at children."http://arthur-ransome.org/ar/" is the place to go apparently.
“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett, Nation