Or when space is a premium. I can't help but think of Shadow of the Colossus game seeing this. That and I can imagine the pain of those rope knots dig into me if a kid is placing their weight on it.

Link courtesy of Geekologie.com

Rope Vest Turns Parents Into Jungle Gym For Their Kids | Geekologie
Because who hasn’t dreamed of having their kids crawling all over them like a human jungle gym (like they don’t already), Atsushi Shiraishi designed the Athletitti, a rope vest that turns parents into pieces of climbable equipment. What a…