The egg is the largest cell in the human body and contains a high amount of water. When the egg is frozen, the ice crystals that form can destroy the integrity of the cell. To prevent this, the egg must be dehydrated prior to freezing.
A slot car (sometimes, slotcar) is a powered miniature auto or other vehicle that is guided by a groove or slot in the track on which it runs.
Some of the faster slot cars use traction magnets to help stick the car to the track for faster lap times. You can use neodymium magnets, in place of, or in addition to the stock magnets, to make the car stick to the track even better and decrease lap times.