I went to the Maker Faire on Sunday.
the r/c naval battles were back again and were very popular.
Also back in force were the steampunks, and about any kind of robot you could imagine.
The R2d2 builders have several full-sized Artoos in various stages of completion. There were also a number of Telsa coils on display. The UC Santa Cruz physics department put on a very fun show with their tesla coil.