Emotional Regulation
Regulation is a skill that develops, and it develops at different rates. A child who melts down over something small is usually not being difficult. They have run out of capacity earlier than expected.
It shows up as meltdowns, sudden anger, tears that arrive without warning, or a child who shuts down completely.
Sessions work on naming what is happening in the body before it peaks, and building responses that can be used in the moment. For younger children that is concrete and practised, not explained.
Parents get the same language so the same approach is running at home. Regulation is learned largely by borrowing it from a calm adult first.