There*s a party in every MUSICBOX candle! Open the Music Box Birthday Candle: Birthday Cake (Black)and sing along to the Happy Birthday song which plays when the lid is opened in bright light. Boxes feature exciting- highly saturated UV glitter. Candles are 100% soy with cotton wicks- and smell delicious - just like birthday cake!****Features:*** Candles are 100% soy with cotton wicks.*** Candle measures 3.75* in height*** Has *It*s not the years in your life- It*s the life in your years* written on the inside cover of the box