Avon 555 Pop Pop Boat - Ying Yang. Black Hand Painted - Unique Design Featuring a Yin Yan Symbol £6.00 Out of stock Pop Pop Boat Hand Painted - Ying Yand Design. Base colour Black Individual design to the top deck. Steam PoweredLength 5.5" Includes Fuel Tray, Candles, Priming Dropper and full InstructionsMore colours available. See options below.