4 years old and in diapers

[Busy ECE mommy]

I don't generally toilet train until the parents have spent a full week of consecutive days at home with the child to learn the process. This child may be developmentally delayed. If the child doesn't have the self help skills at age 4, then I wonder... They need to be able to pull own pants up&down and communicate that they need to go or have already gone. With heavier kids, I don't lift them on&off the toilet, I give them a stool and they do it by themselves. It doesn't sound like he's ready. I'd put the responsibility on the parents to do the training for now, and yes, he needs to use underwear, as pullups are diapers.