One frame taken roughly every 3 days (31 frames). I would set up in our hall way every Wednesday and Sunday evening (my mobile would have a repeating alarm to remind me each time). I would sit him down in position and tell him to "stay". I would hold a treat over the camera and he would look intently at it. Towards the end of the series Henry would see me setting up and come and sit in anticipation. 

For the best hair growing, scroll so you can only see his head and don't get distracted by his feet. Actually, his feet look like his dancing if you watch them :) . See heaps more pics of Henry here.