If you found a wallet with over 200 bucks in what would you do with it?

Before i had my son i probably would have kept the money and handed the wallet in but now i think i would have handed it in with the money in it, you never know they might give you some for handing it in lol. I know how easy it is to loose money i've done it once not 200 but 20 and that was to buy nappies and i had to borrow money. Not many people would hand the money in these days.