In May 2016, Barack Obama became the first sitting US president to visit Hiroshima, site of the world’s first atomic bombing in 1945. He brought with him four paper cranes that he had folded himself.

In the aftermath of an angry student’s murderous rampage on the Virginia Tech campus last April, people tried to make sense of the senseless – and offered their help. What can we do? What can we send?

Origami cranes are cool, but do you know what’s cooler? Origami cranes dancing to the beat. That’s the challenge [Basami Sentaku] took on when he created Dancing Paper (YouTube link). You might ...