A train, one brick at a time.
Calvin got his first electric train for Christmas. He'd been talking about an "El train with doors that work and people that ride on it" for quite some time. Being that specific but without an actual item in mind could have been the end of that wish list item, but his Gram and Grampa found something near enough to fit the bill. And Lego (plus grandparents) comes to the rescue again. It's the Lego City Passenger Train, and while it's not elevated, it looks like the Chicago El insomuch as it's not a locamotive but a modern inner city train. He was able to assemble it entirely by himself (although we assembled the mechanics) and I love that this gives him a greater understanding of the toy itself. A better connection to it, if you will. In any case he's pretty in love with it.