Scratch-and-sniff stamps! From the USPS: "The U.S. Postal Service’s first scratch-and-sniff stamps will add the sweet scent of summer to letters of love, friendship, party invitations and other mailings when the Postal Service introduces the Frozen Treats Forever stamps June 20 in Austin, TX. [...] The stamps feature illustrations of frosty, colorful, icy pops on a stick. Today, Americans love cool, refreshing ice pops on a hot summer day. The tasty, sweet confections come in a variety of shapes and flavors."