Print stamps. If using an inkjet printer, spray both sides with fixative. Let dry. If using the outline version, color with pencils or crayons. If you color with markers, you’ll have to spray both sides with a fixative to keep the color from running. Cut stamps into sheets of four.
You can perforate your stamps using a sewing machine with
Mix up a batch of licky sticker glue. Spread glue on the back of your stamps. Let dry. Spread another layer. Let dry. If stamps curl, weigh them done with some books to flatten.
To use your “stamps” cut or tear them apart. Lick the back or use a damp sponge. Press down on your envelope.