Happy Birthday to you! Wish the birthday girl or a boy a Happy Birthday with this Happy Birthday Sing a Tune Foil Balloon 71cm. This foil balloon plays ‘Happy Birthday’ with a single tap, with music and fun sound effects. The balloon has a guaranteed 50 plays. Item Includes: Balloon. Fit and Sizing: Balloon measures 71cm / 28in. Please note: Requires helium to float but can also be air-filled.