Logical consequences are not punishments. They are ways to help children understand the effects of their actions, repair the situation, and learn to do better next time. There are three basic kinds of logical consequences.
Take a Break: If a child is losing self-control, s/he goes to a designated spot in the classroom to cool down. The break is short. The child comes back as soon as s/he has regained control. Children may also go "voluntarily" to "take a break".
Loss of Privilege: If a child misuses a material or acts out during an activity, s/he will be told to stop using the material or doing the activity for a short period of time. The privilege will be restored when the child and the teacher (a specialist teacher or I) have talked about how to prevent a similar problem in the future.