Chain Gang

You thought that the Devo song was allegory? Junior doesn't hit the books like you think he should?

You need the Study Ball!
For the low, low price of £75, you can shackle your student to his assignments (figuratively) and a 20 pound ball of iron (literally).

Concerned mums and dads set the desired study time on the Study Ball and attach it to their child's ankle.

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.

See? It's safe! Has a "safety key" and everything.