LEGO Halloween Cat & Mouse Seasonal Building Set 40570 Retired New In Sealed Box. 328 pieces. Build a cat and a mouse coming out of a pumpkin on a fun autumn base! Great set for anyone who loves LEGO and/or Halloween! Retired set (was available August 2022 through December 2023). Box is sealed and in excellent condition. Please see photos for details. Box measures 6" W x 5.5" H x 2.75" D.