Gordy,
Rumspringa is when the Amish youth (teenagers) get to go wild and sample the world. Their parents & everyone look the other way in any wrong doing. Sowing their wild oats so to speak. When they are done, they make their final decision to either leave the religion they were raised in or dedicate themselves to it. I'm not sure if they get baptised but there is some sort of ceremony for dedication. They have to be good after that and go with the flow. If they chose to leave they are cut off by the family for leaving the religion. They were given the choice to make after sampling what they would be missing. Like Mamochan said...The witness youth do it, they just have to hide it.