when do we lose the innocence of youth?

i've been wondering all day. i've decided that babies are born innocent, and that the world influences and manipulates their nature during the process of their growth.
i played peak-a-boo with this adorable toddler in zippy's today. he was sitting with (who i assume is) his father at a table, and i was sitting on a bench waiting for my take-out. only 10ft, a thick pillar, and shyness seperate us. i waved when he started to stare, and he giggled as if i had tickled him. that was nothing compared to the shrill he let out when i had hid myself out of his line of sight and reappeared again. i could see him in the mirror on the wall as we continued our game, in which i would peep out from behind the pillar to see him peering out at me, then quickly hide again. the peak-a-boo-pole.
the little boy, so easily entertained, amused me. how long will it last? i wonder when it will take more than a stranger and a pillar to bring out the unsuspecting, trusting innocence.

oh, and some guy in a huge truck with huge wheels. where the hell are you going to use that? seriously, in waikiki, kaimuki, where is that useful? now if he lived kauai, thats another story!