Standard of box lunch"Rice ball"

It brought in and of the box lunch that had been made at home yesterday was permitted in EXPO 2005. Then, the article on the box lunch today.
The standard of the box lunch is "Rice ball". In addition, there are variously pickled plum and salmon, etc. about the rice ball when paying attention in detail. The variation increases because one twist is added to this, and it puts two kinds of tools in one rice ball. The variation increases because one twist is added to this, and it puts two kinds of tools in one rice ball (for instance, pickled plum and seaweed). The rice ball made for mother for me occasionally becomes such a rice ball. If the assortment avoids it even if there are two kinds of tools, it is possible to eat delicious. Is this a kind of "Taste of Mom's cooking"?