An astronaut, a scientist, and a missionary were riding down the road...

Ok, here's the setup. I picked up my son, his best friend, and his friend's brother from school yesterday. They all jump in the back, buckle up, and we begin the 20 minute commute home. It is always an interesting ride back to the house as they talk about school, gym, classmates, etc. Yesterday the conversation somehow switched to their aspirations when they grow up. My son still drifts between several careers but seems to always come back to 'astronaut' (making his space geek dad sooooo proud). Well, I was informed yesterday that my son is going to be an astronaut, his friend is going to be a scientist that is going to be resposible for getting him into space as soon as he can "figure out how to make robotic joints work" (what?), and his brother is going to be a missionary in some remote country. So, what intellictual debate did this backseat full of potential then begin discussing - the fact that the lunchroom chicken fingers are much better with gravy on them than they are just plain. Yeah, they're still kids.