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Taking away screen-time
This is a double-edge sword kind of punishment, right? You know it's effective because your child coveted his screen above all else. (And you also know it's what you should have done way before there was a need for punishment!) However, by taking away the screens, you'll probably have to cook with a child nagging you endlessly. Yes, it's an annoyance but you're a good mom and you get it done.

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