Wow...your schedule made me dizzy just thinking about it! So many different naptimes! My biggest advice would be to get them all on the same schedule for naps! Those that need morning naps can nap together in the morning and then everyone sleeps at the same time in the afternoon (it may mean waking them up from morning naps after 45 minutes to an hour so they are tired enough for afternoon nap). This way you will have blocks of time to do things with the kids and nobody will miss out. Also, for activities for the older kids, do you have a table you can use that is high enough up to be out of reach of the little babies? This is what I use for puzzles and playdough, art, etc with the older kids...then while they are doing that, the one year olds can be playing on the floor and not getting into the puzzles etc. I used to try to do puzzles on the floor and it was as you described...babies taking pieces and older kids getting mad etc...plus it made it impossible to do activities with slightly smaller pieces that could be choking hazards for the babies.