I have found that even when my kids are quietly doing something, they are still engaged in the story. At various stages of their development they have had various levels of activity, some preferring to quietly play, draw, build legos, etc. I can even remember when my now 14 year old boy was about 5 he would be active, yet he was completely engaged in the story. I think it would have been negative for both of us had I tried to force him to sit still. Just my 2 cents.