When I saw he was using aluminum I thought, "Oh Crap".
But it turned out wasn't a flying model, just rocket power to spin it up on the ground.
But that does beg the question then of building a flying Fidget Spinner rocket..... out of safe materials.
Hmm....
Meanwhile, the group at Flite Test recently made a flying twin Fidget Spinner plane. Well, in their own way. And it flies, though not too well. If they keep at it they'll probably get it to fly better. Since it is not using ailerons, it would really help if they increased the dihedral, they barely have any and only have rudder to steer it.
[video=youtube;IiuB8W8bS0w]https://www.youtube.com/watch?v=IiuB8W8bS0w[/video]
Their model is more like this twin Autogyro model plane, sort of half wing, half spinning blades: