Exploring caves is perfectly fine. The backyard is your best bet. Theseus manages to entertain himself for hours, but he unfortunately has a lot of practice. I have a children's broom you can borrow if you like? Doesn't go over 3 feet off the ground and not very fast. Otherwise the zoo in Irvingly is generally a big hit. Ice cream? There's some kind of bone exhibit coming to town in a week or so, I plan to take Theseus to see it myself.

You're more than welcome to bring him by any time, we have a good-sized garden and Theseus could use a friend to play with.