name change?

The other day at breakfast, Simeon introduced himself to all of us as Daniel. We have been reading about Daniel and the Lions, so thinking this was part of the story for him, taking on the role of the brave boy. Later that day, we were at a waterpark and I overheard him talking to any kid who would venture near him saying, "Hi, my name's Daniel!" Ever since, whenever Owen or I call him Sim he corrects us: he is now Daniel...