I played game with one caregiver and seven toddlers (long life). Now toddlers are kids, all of them top-notch :o
When I started, the first thing I cared about was hunger. Party meal always was on table for toddlers to grab.
Since they were dirty and had low attention, caregiver gave each one bubble bath, what raised both of these bars. Immediately after bath, caregiver flashed toddler cards (raises fun)/was teaching toddler potty (raises attention). Other toddlers had to be on their own, but they always had food. Then he took another toddler then repeated.
When they had thinking level 2, they learned to sleep in bed (before they were napping anywhere and always were tired). From that point game became easier, because they were rested to some point and there was more time to work with them. Fortynately, they almost never had nightmare, maybe because of night light.
Communication, imagination and movement (two-level house with stairs) they gained on their own.