You would have to do some intel but it should be easy. There are so many icons there. Dozens of things in the lobby shadowboxes. You could have them running from one end of the resort to the other. Like give them something to find in the 50s section, then something in the 90s, then back to the 50s, then to the 80s, etc.
It's been a while but icons I can remember is a big 8 track tape, a computer keyboard, a cell phone, a bowling pin, PacMen on the railings of the building, Baloo and Mowgli, a Twister game, a foosball table. And along the walkway at the lake, the first Wal Mart opened up in 1962 (my birth year). One of the shadowboxes in the lobby has an album cover of Barry Manilow.