I ask them to write the name of their most important deity inside the box. That is a help for me in conversations, because often I am at loss how each student names the divine, and sometimes the students themselves do not know a name for it.
I wanted to make a flowering cross. It was in my mind for a long time, but in the end I made a second one with the hand of God on it.
To get the students on their way they can choose symbols and cut them out, but I expect they will come up with their own.
This is a flowering cross.
The second box has the hand of God on it.