All my Sims headed out for work and school, leaving the babysitter in charge. Before they left, they made sure all the little ones were fed, socialized and as green as could be. Two cribs, one swing. Two toddlers (twins), two babies (twins). One set of babies aged up to toddler the evening before and was well rested and spent the night alone playing the blocks and xylophone, the other was tired and put to bed. In the morning, the first Sim up fed him potty trained, socialized etc. to get him as green as possible, then exchanged him into a crib with his sister. The second Sim made sure the babies were in great shape before being ignored by the babysitter.
The babysitter did not ignore her charges. The one with low bladder messed her diaper and had to be changed. She did that, but put the baby on the floor instead of back in the swing. Then she took the toddler who was only up to about 20% energy out of the crib and replaced him with his sister who had 80% energy and had woken up not that long before. I don't have a Sim at home to fix things.
Solution: (at least partially) After 'testingCheatsEnabled true', I lower the boy's energy to near zero so he is screaming his bloody head off. The babysitter is pulling her hair out because of the racket. She finally takes the awake twin out of the crib and puts the sleepy one in. This takes about two sim hours. Once he is asleep I drag his energy bar back up close to half, where it should be by now. I then turned my attention away from the house looking for butterflies, hoping the babysitter will be idle.