What does designed by LILALU really mean? Like all of our products, this Glitter Duck with Crown, blue was lovely designed and developed by us. All our products, wether BIGGYS or rubber ducks, get passed through strict quality control with german and international standards. Each Glitter Duck with Crown, blue rubber duck gets controlled by us on side to guarantee you the quality, that LILALU stands for. Our rubberduck is suited for all age groups.