LAserific Magical Experience, that is… 
Just a layer of yellow acrylic with the letters cut out to expose the gift card underneath, and a layer of black acrylic underneath the card cut to match the outline of the top layer.
Clear glue dots hold all three layers sandwiched together.
A couple of the “insides” of letters I forgot to add bridges to the design so they went buh-bye, others I broke while handling because they were so thin.
