If you haven't seen the 1967 Topps promotional video entitled "The Hidden Treasure", you are in for a treat. Topps posted this on YouTube a few weeks back, and it is an amazing time capsule:
I also like the Topps poster in the widow behind the kid with the blond hair. I have never seen that before.
The "story" of the "Hidden Treasure" is that the kid who is flipping cards loses all his cards to the "new" kid who for some reason has a diabolical laugh. After losing his cards, and not being able to get any cards from his sister to use to win back some of the cards he lost, he goes fishing to "brood all alone", at which point he discovers a Treasure map: