I have all my children in booster seats at the table. We listen to calming music during lunch. As each child finishes lunch I whisk them away to their pack and play, each in a separate darkened room with white noise, give a snuggle and lay them down. They all have learned that this is the routine and go to sleep right away. They all stay in bed for at least 1 1/2 hours. My own son I allow up whenever he wakes. I usually wake the other children after 2 1/2 hrs so we can get on with our days. I do allow them children that I wake up to watch age appropriate tv for 15 minutes or so so they can wake themselves up.
I check all diapers before lunch and rarely does anyone poop after lunch. For some reason it's usually after morning snack. Lol.