And now for all you costume shoppers.Get some Butterfly Head Boppers. When you see yourself you'll croon. And you'll exit your cocoon. Flashing Butterfly Head Boppers flash Red LEDs continuously once activated. Simply slide the ON/OFF switch that is located on the battery pack to ON for light up fun! Butterfly Height: 2.75 in. , 6.98 cm. Butterfly Width: 3.0 in. , 7.62 cm. LED Colors: 2 Red 3 replaceable AG13 batteries included and installed.