Having just coached a 5/6 year old team, I know a 5/6 passing only league will be challenging. We use rules Coach Rob references (5 yd no run zones before midfield and the end zone) and it works really well. The Center drag play was our go to passing play and worked every week 4-5 times a game. Just practicing it increased our passing and receiving skills. I found that the sharks/minnows drill was a big hit, but save it for the end of practice as a treat for the kids listening and paying attention...they love it that much !! The kids loved to run 10-15 yd "bombs" even though we rarely completed one. Rotate the kids and give them all a chance to play center, qb and wide receiver, and you will keep their interest and have a blast !!