The best three Childhood channels deal with animation studios:

-Nicktoons (since 1991) is a collective name used by Nickelodeon for the beginning three original series like Doug, Rugrats, and Ren & Stimpy (which are owned by Nickelodeon Animation Studio).

-Cartoon Network deals with Cartoon Network Studios (which make its own animated shows and shorts for Cartoon Network). From 1996-2003, Cartoon Network used the 'Cartoon Cartoon' brand including Dexter's Lab, Johnny Bravo, Cow and Chicken, and The Powerpuff Girls.

-Toon Disney (a spin-off of Disney Channel) has aired several Disney animated series like DuckTales, Darkwing Duck, The Little Mermaid, Timon & Pumbaa, Recess, Pepper Ann, Kim Possible, Lilo & Stitch, etc. (which are owned by Disney Television Animation).

https://www.deviantart.com/mnwachukwu16/art/Childhood-Channels-with-Animation-Studios-845049973