Baby pictures in lost wallets increase the chance they will be returned

Baby pictures in lost wallets increase the chance they will be returned is an article on Boing Boing explaining that Edinburgh researchers report that "lost" wallets which included baby pictures had the highest return rate, with 88 per cent of the 40 wallets being sent back.

I would print out and place this very picture in my wallet right now, if only I hadn't just burnt my father's new printer due to my forgetting that the printer is 110V, and the wall plugs here are 220V. WHOOPS. 

(From Boing Boing, picture from here.)