untitled polaroid portrait

my son and i were playing a game this afternoon where i was taking polaroid shots of him and where he was taking digital shots of me holding the polaroids i had taken. it's very hard to photograph this one... he moves around a lot, but the game made it a bit easier to do so. how many more children will be photographed with polaroid film type, even 600?

sx-70
polaroid 600 (no nd filter)
underexposed