>Have you looked at their YouTube channels? Eons and SpaceTime are excellent.

I agree. Eons and Space Time are both excellent. I just hope they both start making new episodes soon.

I'd note that you can get those without YouTube's tracking/advertising by going right to the source[0] of those series.

[0] https://www.pbs.org/digital-studios/

My kids love It's Okay to Be Smart