Second Nature Exhibit by Tokujin Yoshioka at 21_21 museum in Roppongi Tokyo, Japan. It is collaboration among a half dozen creator but Yoshioka one is the best by far. I love his ceiling liners. As if you are walking among clouds... Sublime. When comes to this kind of scene, he would be the man to ask. I did not get too much of crystal accumulated arts. $10 or so to get in. Kids are free, so go show them the clouds experience.