The Adventure Playground in Berkeley is one of the coolest places I’ve ever been. I still can’t believe it really exits. All the play structures were made by kids. With hammers, nails, saws, rope, paint, wood and whatever other scraps can be found. There are dozens of huge forts up to three stories tall with bridges, zip lines, tire swings, hand made foosball tables, slides, climbing walls… and many other inventions that don’t even have names. All made by kids.