Isaac had a friend (Luke) over all afternoon. So, when his friend's mom (Colleen) came to pick him up, Isaac wanted to go to Luke's house. Audrey happens to be friends with Luke's sister, Mackenzie, and when Colleen was coming to pick up Luke, Audrey was going to hitch a ride back to their house to spend some time with Mackenzie. We said no.
These were 1.5 ft x 3 ft sheets of poster board. He obviously thought this would be convincing.