Years ago this kids dad could fold heavy cardboard with the help of a
hammer into a fairly decent pair of shoes. He said he did it whem he
was a missionary to Mexico.

I tried a Goo-le search but couldnt find out how they fold them. The
question is,  "Where can I find out how to make these shoes by folding
heavy cardboard"?

If you are a Goo-le researcher with over 500 hits I will accept your
best guess based on whatever you find out. Thanks

PS I think they used to talk about a verse in the book of Matthew
about "making your shoes along the way", when they folded them if
thats any help.