MAKE: Blog has put together a delightful robot-themed holiday gift guide. It includes fully assembled robots as well as do-it-yourself robot kits. Very useful, as Assemblers and descendants of Assemblers will be considered a higher class of human in a post-Robocalypse society.
I particularly like the Karakuri Tea Serving Robot Kit. One of the oldest know robot designs, these were first made in Japan in the early 17th century: