Above: January 2010. Iain at the park in Tustin Ranch. He lovedlovedloved this train and he was very serious about its operation.
And here he is, today. Same train, rather taller Iain. He liked it nearly as much today but...
This park is composed of four interconnecting mini play areas. Each one steps up in terms of height, complexity, and the expectation of physical strength. Today, Iain opted mostly for the second play area. It's shaped like a ship and he decided it was the "Mannequin Falcon" which you may know as the Millenium Falcon.
At one point, he ran up to the only other boy his age and said, "You be Boba Fett, I'm C3PO." This kid looked at him like, "Dude, what?" and proceeded to continue his normal play.