I don't think I'm ever going to complete my collections. I have my max population, all my puzzles are done... basically, nothing else to do but sit and watch for things to pop up... sort of boring, I'd rather be starting VV3.

I need like 4 butterflies, 2 shells, 2 bugs and 1 rock.

How do I get them to appear? I'm worried that if I'm at my max population I may run out of kids before they appear.

The collectibles will continue to reappear until you have collected every last one of them. There's nothing you can do to make them appear!

No need to get bored, you can play both games on the same computer.

They'll come eventualy. Meanwhile, you could start playing V V 3.