Not a kink in any way, but my fascination in age regression stories certainly came from the cartoons I watched, new and old at the time. Whether a plot point of the episode or just a gag.

JLU? Kids stuff

KND? Operations Fountain, Cable TV, amd Grow Up

Tiny Toons? School dance episode

BTBB? The Shazam family & Dr. Sivana episode

MlaaTR? Good Old Sheldon

I could go on, but I think that’s enough.