Some general questions about BRB's

[daddy and son]

My son and I are looking at getting a BRB this year. We had started to do it last year but got a couple of corns instead. They're a little easier and gave us some good experience with snakes. Those two are a year old now and thriving so we're ready to add to the family. I have a few general questions about BRB's for anyone familiar with them.
In doing my research, I've read that they can be snappy as babies. Would we perhaps be better getting a yearling? Do older ones snap until they get used to the individual or once they get used to people pretty much stop altogether? My son is 8 and is very good at handling the corns we have, thinking a yearling BRB that is used to being held might be the way to go. Idea? Opinions?