We should get (Insert amount) Donuts for

Could they not give you the possibility of getting a donut or two when you go visit a friend and tap on a building? They wouldn't be giving away too many and it would give players the chance of getting more to add to their count whilst encouraging visiting friends. I also like the idea of watching videos in exchange for donuts, as said, a lot of games give you the chance to gain premium currency/items this way.