The child stage (反抗期 hankōki, lit. rebellious stage), also known as the toddler stage or in vintage Japanese media as the second Babytchi stage (ベビーっち bebītchi), is the third stage of the Tamagotchi's life. Here, the Tamagotchi becomes much less needy, and the owner's care of the pet better determines what the Tamagotchi will grow into. The Child stage can last from one to three days, depending on the Tamagotchi device, and is followed by the teenager stage.
Original Tamagotchi (P1/P2)
On the Original Tamagotchi, there is only one child character available, Marutchi on the P1 and Tonmarutchi on the P2. The amount of care and the discipline are the important factors which determine what the Tamagotchi will grow into. If a child receives good care and get disciplined enough the Tamagotchi will grow into the better care-teen, Tamatchi (P1) or Tongaritchi (P2). If the child receives the opposite it will grow into Kuchitamatchi (P1) or Hashitamatchi (P2). The worse-care teens can only grow into bad-health adults while the good-care teens can grow into good, and bad-health adults. This means if the child receives bad care at this stage it will not have a long life as an adult.
Mesutchi and Osutchi
Childhood on the Mesutchi and Osutchi functions similarly to that on the P1 and P2 with two exceptions - the ability for the Tamagotchi to make discipline calls despite the bar being full and for the chance of TMP degeneration from neglect to increase drastically.
Mori de Hakken!! Tamagotchi
On the Morino, the child stage lasts nearly twice as long as it does on other vintage releases to compensate for the lack of a teen stage due to the cocoon mechanic. When hatched from a white egg, how high the Tamagotchi's weight is will determine the tier of the cocoon.
Regardless, this is the first stage where more meal options apart from leaves, and therefore snacks, become available. Unlike other releases, there are no consequences of feeding a Tamagotchi a lot of snacks and it is outright encouraged due to the importance of weight in determining a healthy adult evolution, though as they fill both kinds of hearts the Tamagotchi will refuse to eat any snacks after their hunger is completely filled. If an Imotchi is never fed leaves and is of a certain weight when evolving into Mayutchi, they will have the chance to evolve into the special adults Twinaritchi or Helmetchi.
Tamagotchi Connection Version 1-3
The child stage is still important to the future of the Tamagotchi character but it will not determine the adult character as on the Original Tamagotchi. This stage lasts for two days. On most releases of the original Tamagotchi Connection, this is the first stage where the communication functions are available.
The baby's parent's training level determines the evolution from the baby to the child character. The evolution from the child character to the Teen is based on the generation number (even or odd) and on the amount of care. It can receive good, above average, average, below average or bad care, determined by the total number of care mistakes. On the V1, Keitai and Akai, only the healthier child is able to evolve into certain teenagers.
Chou Jinsei Enjoy! Tamagotchi Plus/Tamagotchi Connection Version 4
The child stage is the first stage with the ability to go to "work". The character will receive an invite for the pre-school after a hour turning into a toddler on the V4, while on the Entama it occurs immediately after evolution. While babies on the Entama have a set evolutionary path determined by their family, a Tsubutchi on the V4 does not have an associated family and will randomly evolve into one of the four children.
On the V4 and V4.5, the child stage lasts for about 24 hours and the amount of care, total number of skill points and the family history determine the evolution to the Teen. The character can turn into a Teen of the Mame, Meme, Kuchi, or Universal families. On the V4, a certain child can evolve into one of two families with good care or into a universal teen with bad care, while on the V4.5 a child can only evolve into a universal teen with good care and if its parent was an Oyajitchi or one of the universal adults.
A child on the Entama will graduate from preschool immediately prior to evolution into a teen, while on the V4 and V4.5 they will remain a preschool student for about a day before they receive the graduation summons letter.
Similarly to the Morino, the 4U and its successor lack a teenager stage. As a result, this is compensated by the child stage lasting longer than it usually does on other releases. The child that is obtained depends on the baby's happiness level upon evolution
Tamagotchi Life App
After completing the baby stage on Tamagotchi Life, you get to the child/toddler stage. You can get many different forms depending on how well you took care of your baby Tamagotchi.