Studying feels even more like a death sentence with the Study Ball, a prison-style ball and chain that you can program to keep track of how much time you spend studying. Just punch in how long you’d like to study and a red LED indicator keeps you informed as to how much longer you have. But beware, once the chain is locked, it won’t come off until your time is up. Just use your better judgment; this isn’t as sexy as those handcuffs hidden under the bed.