I knew there was a cool game somewhere... and now that I see this again, I'm thinking "what a cool "Three-house" idea for when it's 3 players and up. 3 players need 9 pieces (3 of each size) and 4-5 players need 6 pieces (2 of each size - which only means 2 Treehouse stashes). That's cool - a game that's possible with only the 2 Treehouse stashes (one Xeno, one Rainbow). Nifty! Thanks for the link!!