We are 'structured unschoolers' LOL! We are using some curriculum on an ad hoc when-we-feel-like-it basis. We have a routine, my children - and I - seem to do better with one. We found if I just did interest led, my children got bored and started destroying the house, it wasn't 'enough' So now I introduce things in the morning, but allow plenty of time to do anything they like.
In regards to the OP, if your 6 yo can concentrate for an hour on something she is interested in, it is unlikely that she has ADHD. Most children with ADHD can't concentrate even when they want to.
