The eternal optimism and limitless persistence of a child has to be one of the most powerful forces in the universe. Case in point:
My husband's mobile phone came with a FIFA soccer game. My 7 year old lives to play this game, so much so that we had to institute a house rule - when his father comes home from work at night he is not allowed to ask to play until after he's at least said hello. (You can guess how Jay's entrance now sounds each night - "hi dad, can I play soccer on your phone?")
Last night as we were getting the kids into the car to drive home from a Purim party my son asked my husband (all together now) whether he could play soccer on his phone. Jay told him no, and that besides, the phone was buried in the trunk and inaccessible.
Five minutes later he asked again, knowing that a) he'd already been told no, and b) the phone wasn't even there. When I asked him, he told me that his father had already refused, and when asked where the phone was he knew it was in the trunk. So really, other than to nag for the sake of nagging, what was the point in asking? He knew that his request could not possibly be granted, but something compelled him to keep trying anyway.
If more adults managed to hold on to that persistence and optimism I suspect the world would be a very different place. Not necessarily less annoying, but probably more productive.