Hello,
I have attempted something: https://invent.kde.org/education/gcompris/-/merge_requests/154

I was thinking about it a little more (trying to find a logical theme where numbering is something not weird as numbering on a caterpillar :D) and found that we could use the theme of house numbering (as in a street). But,using locomotive and wagons is totally fine (and can also work with letters).

Not really. The one that I know (from book) is just showing a table as follow: