. >> this is really sumer nice to be here and not have to limit yourself. and no that you will not be bullied or hurt. >> reporter: the camp rents the camp from another camp. so masking tape hides the world of lord or god. >> in a lot of ways, religion and science share a motivating force. >> reporter: they are socrates cafe where they are free to discuss whatever is on their mind. >> i don't need somebody to pray to. i just find a way myself. >> reporter: do you they whatever your pampbts are, you become. >> my parents, their parents were religious. and they became atheists. >> reporter: but sierra's 12 and she's never believed in god. don't you have to be exposed to it. >> some of my family is catholic. i have gone to a wedding and funeral. understand why they want to believe in something like that. but i don't really understand it. >> reporter: they are not alone. according to the 2008 census, more than 34 million americans don't believe in god. in just the last two decades, the number has more than doubled. >> reporter: some people say, you guys are bra