I know a police officer who lost his wallet the week before last and it had �70 cash inside it, the person who found it looked him up on facebook and returned it to him, so it's not such a bad world after all.
I would go with the biscuits idea; my grandad would like those, because of his medication he has to be careful re drinking, plus some people are funny about whether they drink red or white, and he could enjoy a nice biscuit with his tea. M&S do nice boxes and oldies tend to be impressed when they get something from M&S LOL