We’ve already introduced you to the concept of the Fun Theory via Piano Stairs and they’re back out in the field to prove their hypothesis. Tackling the issues of littering and recycling they set up 2 new fun ways to get some attention. The Bottomless Trashcan looks ordinary enough but when you drop a piece of trash it sounds like it takes forever to drop down to the bottom. In the same theme of trash collecting, the Bottle Bank Arcade turns recycling into a fun game with flashing lights and a scoreboard. No one even noticed the other bottle bank around the corner. Just more evidence that the Fun Theory really works!