Separate cards into two piles: those that need to stay open and those that do not.

Cut the fronts off of the cards using the scissors. You can also cut the cards into smaller shapes and designs.

Glue each card down to the canvas. Only glue to the bottom of the cards down if you want them to be open and viewable. Let dry.

Spread one thick coat of Mod Podge over the canvas, let dry 20 minutes, and then apply a second coat. Let dry before displaying.