Congratulations to all of you!
It's great when the whole family can share a hobby.
Out of interest, how old are your children and how old were they when you started them in the RIB (or any boat, for that matter)?
P.S. Can't beat your record - only 2 qualified powerboaters in this family but our 2 year old has his own sailing dinghy (can't sail it yet, mind!) so hopefully he'll grow up with a love of boats.