On average kids are vastly smarter than we give them credit for. From 18 months to 4 years, kids add ~10,000 words to their vocabulary with minimal repetition. 26 letters and 10 numbers is nothing as long as it's meaningful for them.

Educational entertainment is more about parents than education. However, kids also like to learn things so interesting and educational are frequently linked when done well.

PS: If you actually want to teach kids to read then integrating subtitles and story seems like a great option.