I'm so very glad this didn't come out twenty years ago, or my parents would have used it to set my console usage at 15 minute increments, allowing me to never reach a save point.
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The GameDr—whose degree I'm almost positive is honorary—can beep warnings at T-10 and T-1 minutes, hopefully to let them reach a checkpoint and turn the game off gracefully.
Why wouldn't your kids be smart enough to just take the power cord off and plug it in directly to the power strip? Because it's "tamper proof", which means they'll have to break part of it to get to the cable.
It'll be $30 this June. [Digital Innovations via Oh Gizmo]