This is a cheat, as it's not something I wrote myself: from the "Funny requests from patrons" thread on Library Thing -
I was working the desk one day when a little boy (not more than 3, if that) approached my co-worker and asked for pictures of "cow powers." Attempts to pry further information from him came to naught...as did catalog and google searches and a desperate "Do you have any idea what he's looking for?" to his mother. Trying to think like a toddler, my co-worker asked "Had he seen cow-powers on TV? Were they a cartoon?" "I want cow powers" was the only reply. Hoping she was on the right track and knowing my love of all-things-animated, she turned to me and asked did I know about the Cow Powers? Didn't ring a bell...but something clicked in my brain and I turned to the little boy and asked "Are you looking for books about caterpillars?" Apparently I'd correctly translated the Toddlerese for he gave the two of us a big grin and announced "Cow powers are BUGS!" So hand in hand we wandered over to the 595.789s where we found lots of "cow powers."
I'm just astonished that the mother didn't know what the kid was talking about