These are some photos taken in a restaurant in Osaka, where customers can cook their own takoyaki and then eat it.
You can see above the "real" thing - a photo taken in Tohoku.
And below, the takoyaki pan looks like this:
Just pour the batter into the molds, then add the pieces of octopus and the other ingredients:
And make it into balls with the chopsticks. Even my friend was cooking takoyaki for the first time. :-)
This is my result - hopefully round enough for a first try.
Anyway, the idea of cooking your own meal in a restaurant is so interesting. There is a wide variety of hands-in experiences in Japan.