I keep separate accounts with totally different purposes, which allows me to keep a "clean" algorithm, allowing me more perspectives into what is currently out there.

It's a balance between making content engaging and safe; too many quick cuts and artificial sounds can certainly draw kids in, but it is "harsher" on developing brains and can easily cross into being overly stimulating. I would want to focus on storytelling, with slower-paced videos, from the perspective of kids, drawing them in by getting down on their level, not speaking down to them. This has the added benefit of appealing to parents too, which ultimately is the determining factor of whether kids will have access to media.