What do you do when your child just won't behave and absolutely refuses to study? You lock him up in a derelict hut deep in the forest, and force him to study under a roof full of tiny hairs which are — on a closer look — millions of tiny, hairy, disgusting caterpillars.
And since the hut's roof is so old and dilapidated it can collapse at any time. The threat of all of those creepy caterpillars falling on your child's head should really motivate him to study. The faster he studies the faster he'll be able to leave the hut!