While studying/working is important, taking breaks is also important. If you happen to use a pencil for your work then you might want to check out these Foosball Erasers ($12). Since they come in a pair you can start a foosball match with your friends.
Whether it be at the office, during a lecture or catching up on an art lesson, these Foosball Erasers are sure to keep you occupied during that half an hour before lunch. Just pop these handy rubbers on to your pencil, screw up a post-it note and have yourself a pretty special mini game of Foosball.