IMO the man is brilliant in teaching his applications of simple science for children of all ages.
That's right, if you didn't get it the first time around then these toys can lead back to the learning.
The first of his videos I saw were in Hindi language yet I understood them. Then I found the English versions.
I think that many of these things could be Arduino-added/instrumented to put values on what is demonstrated.
They could make fine secondary school science fair type projects, maybe even be used in freshman design projects.
I subscribed so his channel shows up on my feed. If I'm 'bored' then I look for ones I haven't seen yet.
But then I do that with a lot of different channels.