The Happy Birthday Cake Topper not only plays "Happy Birthday to You" but also flashes along with the music! Ideal for those who aren"t so blessed in the cake decorating department, this Cake Topper is great for Birthday parties! This Flashing Musical Cake Decoration makes birthday"s a celebration to remember.Top your cake off with this bright, flashing message topper. It"s a fun and re-usable decoration. Wipe clean with a damp cloth after use. Requires 4 x AG13 or LR44 alkaline batteries, a spare set is also included. Each set of batteries lasts for approx 40 minutes of playing time.