Old Pesos, probably worthless, but wanted to double check

Yep, worthless; we don’t use those anymore here in Mexico....

My father-in-law has had these for the better part of 30 years, and while I know they have no worth via face value, I wanted to double check before they either get turned into an art project, or melted down into metal for a science experiment, etc. All of the images have the face value, apparent color, and the years that we have. Thanks!