As a kid we all did our own thing, be it build a pillow fort, played on jungle gyms, took naps whatever. The other day, I build a pillow fort and it was actually really fun. I've also bounced the idea of adult sized playgrounds off my friends. Big slides, tall monkeybars, teeter totters that took you twenty feet up, that sort of stuff. What do you guys think? What activity from our childhoods would make society a happier place?