The tongue of concentration.
N-meister in particular, could have spent four times as long there. Still really into science and understanding, he didn't just enjoy the cool whiz-bang affectation of the center, he kept trying to go one layer deeper. Love that!
"Don't touch the butterflies" proved to be an intensely difficult directive to follow.
Waiting for the van to be returned. Hesitate to think about what creepy bench guy was waiting for.