Kamishibai means paper play. It is a form of street theatre that the Japanese practiced to entertain themselves and their audiences. In an age of no television and no radio, this was what watching anime and reading manga were like for these people.
It's really interesting to see the origins of what we have today. How such an old and simple form of entertainment can adapt and evolve over the generations. It's nice that it has survived for our lifetimes.
Yes. Thanks to the internet, we can rediscover old forms of entertainment.