All of the above, plus, I'm never (well, rarely) bored. There's always something to learn! Or to look at! Or to touch, because it feels furry/crinkly/whatever! Or to imagine; there are no ends to the imagination! And I always have someone to have a conversation with (granted, it's myself), so I can share my opinions about all of this stuff with me! Honestly, just the ability to be constantly amazed and learning, is such a gift. It ties in with the childlike thing, I think, because I often relate better to children. As an example, in a park the other adults will be standing talking about so-and-so and her job, or his car, while the children are creating worlds to play in, or picking up interesting bugs, or wondering what kind of tree this is, and if it can be turned into a pirate ship. Guess which group I join?
And when all that fails, I just walk across the university campus and get distracted by the bunny infestation. Bunnies!