A very small toy, that when interacted with, will add a sentry bot toy to your inventory; or, you can just deactivate it. If you decide to destroy it and pick it up, you'll get a broken version. He'll follow you everywhere, through regions, and it can open closed doors. If it becomes under attack, it will just roll away until destroyed or the attacker loses interest. Graphically, it's identical to the regular sentry bot, except 4.5x smaller. It's somewhat noisy when it rolls around, and when the sentry bot toy is stationary, it will do different stances with its arms, like a plane checking all flaps right before take-off. A good side companion, but it can't fight.