We have a chill-out chair. Just my thought but most of the time the crazy behavior (non-aggressive) is solved if the kiddo is separated for a moment and sort of re-starts back into the group. Now my middle daughter gets a "chill out room" because she is the tantrum thrower of the bunch but for the rest, the chair works. i dont have to use this too much though because preventative measures solve a lot of stuff.

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