You created the right climate in Jimmy's room. The horror of a hand coming out in the wee hours to scare his wits out is horrible enough. However, I couldn't get the connection between his bedroom scare and the school bully episode. He gets hurt in school and he has a drunkard stepfather to compound his worries. Why do the hands of his mom shake?
There are three people in the story and all the three have different kinds of horror taking place in their lives.
The box has taken the boy away. A bit sad that he couldn't win over his bullies neither the pale dirty fingers that snatched him away.
Connectivity is what I am looking for. It is more like horror for horror sake.

Write on!