Admittedly this isn't on par with Sir Alexander Fleming's accidental discovery of penicillin, but my 2.5-year-old son's strong ferret instincts to hide things has been producing some inadvertent holiday cheer at our house.
The other day, post sneeze, I grabbed a tissue from the box and heard, to my confusion, a pronounced tinkling, jingling, sound. Huh? I reached into the box and found a small cat toy - a lattice ball with a jingle bell inside, no doubt placed there by my son who spends half his time stuffing puzzle pieces, coins, small cars, etc. in any nook and cranny he can find. (Either that or one of the cats is more dextrous than previously imagined.)
I decided to keep the toy there and now I get a little holiday jingle whenever I reach for a tissue. It puts a smile on my face and might produce some smirks around your house, especially if you're having a out-of-town guests. Any jingle bell will do if you don't have cats.