This patent-pending design has an innovative mechanism in the opening flap, which triggers music or sound to be played each time it is opened. These mailable envelopes allow consumers to add a surprising burst of sound to almost any greeting card. The new envelopes also feature themed designs to create an exciting way to package a greeting card that's not only visually appealing, but also a lot of fun.

"We know that consumers want to create memorable experiences when celebrating special occasions to show their friends and family just how much they care," said Mary McClain, new product concepts creative director American Greetings. "Music and sound envelopes are a unique way to customize a song or sound clip to an already carefully selected greeting card and it adds such a wonderful surprise when the envelope is opened."

Featuring a variety of songs and sounds, the collection has everything to delight recipients, ranging from "What I Like About You" by The Romantics, "You Got It (The Right Stuff)" from New Kids on the Block, and "Happy Birthday" to people cheering and animal noises. The envelopes are perfect additions to any birthday or other festive occasion.