Okay, don't laugh, but maybe something along the lines of dreams? Just trying to be creative here...
Instead of 'oinking' something, someone could 'star' it or have it on their 'dream list' or something.
It could also be a different type of theme like Fishing...you could 'hook' items instead of 'oinking' them. (Not my favorite suggestion, but it shows a different train of thought for the theme of the ATP swap.)
Is there something plant-related that we could use? Is there some sort of plant terminology that refers to a plant catching something it wants? Maybe with venus fly traps...? Hmm...
