The LEGO promotional set 40397, Koi Fish, is a monthly mini model build that includes 33 pieces. Aimed at children aged 6 and above, this complete set features a Koi Fish theme, perfect for those interested in animals. Released in 2020, this set comes in a polybag packaging and measures 6.7 inches in length and height. With the iconic LEGO brand, this set offers a fun and creative building experience for young builders.