In this particular case my child is fairly high functioning and not non-verbal, so I wasn't aware of this particular need. We do use some small pictoral cards w

In this particular case my child is fairly high functioning and not non-verbal, so I wasn't aware of this particular need. We do use some small pictoral cards with him to help prepare him for transitions, but it's literally like laminated clip art. Don't really need something high tech. In that case presenting him with an ipad would likely just distract him... But I sympathize with your general lament over "why didn't I think of that?" Haven't we all experienced that SO many times?