How does a tamagotchi evolve?

when mine evolved into teenagers i played with them for more than an hour (i got out a timer)

then i made them go to sleep by setting the time to 10:00

WARNING: when i set my tamagotchi to 10:00 you have to remember that it will wake up in

nin hours (i had to get up at 2:20 to check mine but it is worth it.)

Answer 2: Newborn-1 hour Child-1 day Teen-1 day/2 days Adult-10/11 days

Hope it helped