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WackyMeetsPractical
Since: Oct, 2009
Freezer
Since: Jan, 2001

Is there a trope about kids on sitcoms being replaced because they're not cute anymore?
Like when the first kid gets older, another cute kid is put on the show to keep ratings up.
Example: In The Cosby Show, When Rudy got older and "less cute", Olivia was introduced.