That being the case, maybe you could, when you have the time, go to places you'd normally go to for a reason - only for NO real reason. Go to the grocery store and just walk around and look at things, without the pressure of you having to shop and him having to be shlepped along. Talk to the customers and workers, point to the different fruits and veggies and so on. Walk through the neighborhood without a real aim and notice what he gravitates to: the flowers, the rocks, the leaves, the bugs, whatever. As PP suggested, ride the bus or train for a few stops; riding the bus home after a walk to a bus stop a few blocks from home can tick off a lot of "boxes" in terms of having a busy morning out for him.