I know someone (never mind who) who used to tie herself to a chair while studying in order to not randomly get up and go do stuff. (Obviously, she could untie herself in case of emergency.)
Now, there’s a new way to do that:
Parents struggling to get their kids to revise in the run-up to exams can now keep them at their desk using a ball and chain that only unlocks when they have studied for long enough.
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.