The Baby-Hams are a group of four little hamsters, children of Mama-Ham and Papa-Ham, who appear in Hamtaro: Rainbow Rescue, and cameo in some other Hamtaro media. Due to their young age, they can only say "Eeee?".
In Hamtaro: Rainbow Rescue, three of the Baby-Hams run away, and have to be retrieved and returned to Mama-Ham (who is in a state of complete panic). The fourth Baby-Ham, according to Papa-Ham, was dropped off at the nursery.
Papa-Ham also reveals that the fourth baby (the one with gray ears) is his son named "Bobby"; the names and genders of the other three babies (the ones with brown ears) remain unconfirmed.