accept a meal when sick. Life cycle The pet goes through several distinct stages of development throughout its life cycle. Each stage lasts a set amount of days, depending on the model of the toy, and when it reaches a new stage, the toy plays a jingle, and the pet's appearance changes. The pet can "die" due to poor care, old age, sickness, and in a few versions, predators. The pet's life cycle stages are Baby, Child, Teenager, Adult and Special. There formerly was a Senior stage. Usually, the pet's age will increase once it has awakened from its sleep time. Poor care can cause a pet to die, but on certain releases, it can also die of old age. If an old pet dies without producing offspring, the family line has ended. The Japanese Tamagotchi toys usually feature a ghost and headstone when the pet dies, but English language versions have been changed to show an angel at death. There is sometimes more than one death. Pressing the C button shows the age at which the pet died. After the pet dies, a player can restart the game by pressing the A and C buttons at the same time. Additional features In recent models, the player earns currency called Gotchi Points while playing games, and can use the currency in an in-game shop to buy different foods, toys, accessories, or even room decorations for the pet. Connectivity Using infrared communication, two players can link their toys and the pets may form friendships, play games, exchange gifts, and even marry. Connectivity was introduced with Osutchi and Mesutchi. The Japanese Keitai Kaitsuu Tamagotchi Plus was the first model to have an application , Since then, many subsequent models have also been able to interact with apps like Tamatown by using alphanumeric codes generated by the toy to log into the website's Flash game. After generating a code, the toy remains paused until the player either enters a logout code or cancels. The player may play minigames in the town to earn Gotchi Points, or use Gotchi Points to buy items in the town shops. To transfer points and items back to the toy, the player signs out of the Flash game and is given a code to input back into the toy. Newer models, such as the Tamagotchi 4U and the Tamagotchi 4U+ can connect to other Tamagotchi 4U units, as