I'm extremely frustrated with the collections. I found them fast and furious during the first few generations, but I'm at the point now that I've achieved everything except completing three of the collections. There's nothing left to do but circle the yard looking for them. I've changed the background on them so the show up in very obvious white squares - there's no way I can miss them. I found a new one about once every 3-4 generations. A generation lasts about a week for me - so one new item a month is pathetic.