...was a train set. Not a silly little one with a miniscule circular track, but a huge layout, with steam locomotives, signal boxes, and roads and rivers! Okay, I can still dream, I suppose...
I have some wonderful memories, you see, of the set my grandfather set up in his attic. Sure, it wasn't as big and impressive as some you see, but it was like heaven to me, Sadly, to avoid any ugly conflicts between the grandchildren, he sold it a short while before he died.