For the adults, there's the world's most dangerous blender:
This one is pretty impressive:
The main attraction appears to be the robot battles, which take place in a huge walled-in arena. The wall is necessary because the robots throw one another against it and people could get seriously hurt by all of the flying metal. It's pretty exciting in a weird Thunderdome way.
There were a couple of these fascinating robotic balls roaming around.
Who knew there was so much fun to be had all in one tranquil spot by the bay on a Saturday night?