When beginning the surgery there will be a red button on the back of Bum. Rub cream on it to open up the robot. Inside the robot will be tons of acid. Vacuum it up. Click the vacuum down on the little dot near the top of the battery. Once all the batteries are fully charged, burn the little dot on top of the battery to go the next part of the surgery. You will now see a large battery and four broken yellow circuits. Staple the area where they are broken. Charge the area where circuit starts with car battery. Then, charge the large main battery in the robot to end the surgery.