[quote=@Heathen]
At one point I want to have them do some kind of dance for fun. Like a Halloween dance. I want Danny to go as a cute Peter Pan :P
[/quote]

Damian will sit in the corner alone unless someone tries to get him out of his shell (he'll literally try to make a shell around himself with his shadow). If he does wear a costume, it'd probably be very basic and thrown together.