Dorothy's friend slipped her an invitation to his birthday party, but the whole class wasn't invited. I asked her when he gave it to her, and she revealed a method the kids used all year long:
"When we want to go somewhere, we roll our pencil there, and then we get out of our seats to get the pencil. So Grady rolled his pencil to me, and gave me the invitation, and then I rolled my pencil to my backpack, and I got up and put it in there."