Hello, my son is 18 months old, and of course he does not handle the insulin bomb, and of course this TB that is never alone and that his parents are not always alone with him, he has grandparents, uncles, etc.
They all have because they know how to drive the whole machine, but if you want to keep it an afternoon they have to know how to put the bolus, for them I have made this role that I attach.
It is not that they are dumb, it is very easy to handle the machine, but it must be recognized that it is scary because a failure can cost very expensive, but your son does not have because he cannot keep his uncles to sleep if he wants to stay.
I hope it helps you.