My kids lose their toys all the time. It's maddening really. When they lose something they come to me, and half the time I have no idea what I am even looking for. It's usually some small Lego piece that I would consider not that important, but for them, it seems like it's life or death. I can't tell you how many times I have told them that they need to do a better job of cleaning up their legos. We have piles upon piles of lego pieces and it seems that they just keep getting bigger and bigger everyday and that makes my job more difficult.
Maybe we just have too many legos?