My kids are much older now, but we always supported them watching Dinosaur Train, in which the clearly independently wealthy Pteranodon family with their adopted son (a t-rex) go on a mysteriously large number of vacations via a maybe-magical train to visit other dinosaurs in various climates and time periods.
We also liked PBS’s Word Girl, which mixes superpowers and grammar with kind of a Rocky and Bullwinkle style humor.
We loathed Octonauts and especially Littlest Pet Shop, both of which, sadly, my kids really enjoyed.
Worth touring for the architecture and great view from the back lawn, though some of the rooms are really gaudy, clearly meant to show off wealth more than decorative taste.