Don't make your child go again, if he don't like it, he is not likely going to like it unless the teacher say sorry or pamper him. It is not likely that is going to happen, so regardless of how long you wait for the playgroup, it is worthless to send your child to where he don't like it and it may be later turn out he don't like school because of that. The instructor for playgroup various and I don't think they need licence like teacher do so buyers beware.