If your kid won't settle down and do their homework, you need a Study Ball!
A red digital display counts down the "Study Time Left" and the device beeps and unlocks when the time expires.
The prison-style device weighs 9.5 kg (21 pounds), making it difficult to move while wearing it.
It cannot be locked for more than four hours and comes with a safety key that allows the manacle to be opened at anytime.
The ball and chain costs £75 and is sold online at curiosite.com.
They should make it nerfy so that the detained student can't cause too much damage.