Every visit, every time, DD is asked by her allergist to demonstrate how to use her injector, how to use her inhaler and of course she does excellent peak meter blows for them.
This has been happening since she was 4! She is now 15. Never too old to practice or review.
The times she has been in the ER the staff are always complimentary on her education and ability and when respiratory is called in they are always impressed with her technique.