That sounds like a fairly tall order to me. I would be overly concerned about the child's safety/injuries etc. Are you with a licenced agency or private? I would be seeking outside supports to come in if possible. I guess it depends on the ages/needs of the rest of the group. Most of mine are toddlers, and that's enough work just to focus on them right now! Only you know what you can handle and how the rest of the group will respond.