. >> we have had sex ploration, sugar, red, blue. many things. >> what is the theme tonight? >> rock, paper, scissors. we are having a tournament tonight, but we have also used as a jumping off point to explore lots of different ideas. you can find out about rock, paper, scissors as a game as a reproductive strategy. you can interact with a piece of art created by lucky dragon. you can get your hair cut from a cool place called the public barber's salon. they use scissors only. you can find out about local geology, too. >> that sounds like fun. let's check it out. >> this is the most common rock on the surface of the earth. interesting thing is, most of this rock is covered over by the ocean. >> error congested a cool presentation on plate tectonics. tell us about what we just saw. >> we wrapped up a section of a lesson on a plate tectonics, here at the exploratory and -- exploritorium. >> are you excited to see people here having fun and learning about science? >> the people that come here are some selected to begin with, they actually enjoy science. i teach teachers to have

. >> we have had sex ploration, sugar, red, blue. many things. >> what is the theme tonight?