This reminds me of Geocaching because it's part of something bigger where you trade things that you don't really need in hopes that it benefits someone else. The Swap-O-Matic is a vending machine art project that is traveling around Brooklyn where people swap goods for free. You can either donate, take or swap. It promotes a more sustainable way of trading through reusing. In the below video they kind of use horrible examples - I don't think I would take a Pikachu toy...
Swap-o-matic - Promotional Video #1 from Lina Fenequito on Vimeo.
