People make giant sized versions of things all the time. Okay, maybe not all the time, but we've seen coffee table sized NES controllers, there's a guy trying to build the entirety of Super Mario Bros. 1.1 out of LEGO. In short — we've seen things. A giant human sized Game Boy made out of cardboard? We haven't seen that. Until now.
I supposed if someone asked me to imagine a Game Boy Color made out of cardboard, I think I could do that. But to see it in front of me, in my face as a real thing? Yeah, that's crazy.
It was built by MaboroshiTira and it looks amazing. The detail is pretty incredible, I especially love the use of cardboard grooves to replicate the black borders around the screen. True genius!