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