For reference, my 3 comics/stories so far are -
World of the Immortals, where an Earth-based college student travels to another world, where they decide to keep her as a baby.
Prisoners of the Nanny Bots, where an arguing space-travelling family comes across a robotic nursery, and their mother happily allows the over-eager nanny-bots to diaper and spank her two argumentative adult daughters, though it looks like the robots may not stop there.
Island of the Giants: Undercover at Daycare, a prize-winning journalist sneaks into the daycare on an island of unusually tall people, intended to get a scoop on reports that they're keeping short foreigners as captive oversized adult children - but she might just end up getting a long-term first hand account. This one was a bit lower quality and cheaper, with black & white images.