The next day at 8:45, there's a  knock on the Personnel Manager's door. The
 foreman comes in and starts ranting about the woman he had hired. After
 screaming for 15 minutes about how badly backed up the assembly line is,
 the Personnel Manager asked him to show him the problem. Together they
 head down to the line and sure enough, Elmos are backed up from here to
 kingdom come.

Right at the end of the line is the woman. She has pulled
 over a roll of material used for the Elmos and has a big bag of marbles.
 They both watch as she cuts a little piece of fabric and takes two marbles
 and sews them between Elmo's legs. The Personnel Manager starts to kill
 himself laughing and finally after twenty minutes of rolling around, he
 pulls himself together and walks over to the woman and says, I'm sorry, I
 guess you misunderstood me yesterday.  What I wanted you to do was give
 Elmo two test tickles.