From the SpongeBob SquarePants Classic Party Supply Collection. SpongeBob SquarePants Birthday Sound Candle. The perfect addition to your little one's Sponge Bob party cake, this fun candle plays sound and features a smiling Sponge Bob surrounding the bottom of a yellow swirly candle. Press the play button to hear Sponge Bob saying "Happy Birthday!" It can also play in a repeat sound loop if desired. Candle measures approximately 5" tall.