K'NEX Basic Set 30010 Yellow Hard Box Carrying Case with pieces Vintage 1992 The K'NEX Large Yellow Hard Box Carrying Case is a vintage storage container from 1992, designed to hold K'NEX pieces. The box features a bright yellow color and is part of the Kid K'NEX product line. Made of durable plastic, this box is perfect for storing and transporting K'NEX sets, making it a must-have for any building toy enthusiast. The nostalgic vintage aspect adds to the charm and collectability of this classic toy accessory.