My nephew used to use my Netflix for fun..one time his mother asked him few questions of maths for fun and to all ou suprise he was just too much for us to handle
He could multiply 25*25 divide numbers knew all tables could do most of the stuff we could just imagine him do.
He is just 6-7 year old...after lot of inquiry about who taught him this he said number blocks...took use really some time to understand he watched it on Netflix.
Great stuff...I think his ability to enjoy the show made him understand the simplicity of maths involved.
We are trying to get him lear more, but we find his ability without this show... really great full.