Toddlers are very hard to educate. They're really too young to benefit from true discipline - the kind that has threats and punishments. A parent can punish a toddler over and over again and still find that the toddler is doing the same behavior as before - they don't seem to learn from consequences the way older kids do. The most common teaching tools parents can use with toddlers are positive attention and distraction. You might ask the playgroup instructor of she can try this: when your little boy squeezes a child, the teacher should go up to him and show him how to pat the child lightly or hug the child very lightly. She can model this and also put his hands in the right place in the right way. Once he is doing the right thing, she should give loud, happy positive attention (praise) by saying something like "Good for you! That's the GENTLE way to touch! See how the little girl likes that. We like that..."etc. The teacher should give virtually no attention to the wrong, squeezing behavior. Let her try that for a couple of weeks and see if there is some positive change.   Sarah Chana