The biggest one is dragging the food to an accessible place if they're really hungry, or to a place they can move to if they're less hungry and you want them to gain movement skill.
The only skill adults are required for is the first level of potty training. If you are content with not maxing out every toddler skill, the adults don't have to do so much.
The tablet can teach most skills and the toddlers never get mad or sad moodlets because of them. They will generally not stop using them autonomously unless their needs get really low. They don't learn skills as fast, but they stay still! If two of them use the tablet in the same room I believe they will talk to each other and gain communication skill, but that was a while ago so don't take my memory as absolute fact.
Reading them to sleep every time they go to sleep raises the imagination skill fairly well and they sleep better.
Controlling the toddlers is usually easier than having the parent control the toddler.
