My 3 years old boy loves looking at miniature models. Whether it is houses, malls or other buildings, as long as they are tiny and small, he's all eyes over it! He can just stand there looking and looking and yelling out what he sees in the models.
Whenever we go to this mall near our house, he will surely tug our hands asking to be brought to the showroom unit in the mall. There are a bunch of housing and mall projects developed by the same developer that built the shopping mall we went to. So this showroom has a bunch of models of condominiums, bungalows, shopping malls etc.
I too love looking at miniature stuff like this, imagining tiny little humans living in those small little houses, cruising in the small little cars on the roads, tunnels, etc.
I remembered when I was about 12-13 years old, I got my dad to buy me this bunch of tiny fishes and I actually arranged and stacked some rocks and pebbles, put them nicely in an ice cream container that I have. I'd make bridges, paths and filled them up with water and put the fishes in. Then I'd sit there watching at the fishes swim around as if I'm the mayor of the fish city hahaha...
I guess my boy might have inherited my habit. We'll see if he ever gets to the fish part one day! It might make a pretty interesting activity / hobby!