The ROBOTIME MRX01 model kit includes two sets: Last City (MR01S) and Future City (MR02S). This 3D marble run puzzle supports horizontal and vertical expansion, compatible with various extensions for diverse play configurations. The model features vibrant LED lighting, adding dynamic visual effects to gaming setups or room decor. It operates in two modes—rolling and lighting—with an infinite loop function inspired by Parallel World and Miniature City concepts. The design incorporates energy centers, sky pathways, and multi-level structures for immersive play. Assembly is streamlined with a modular design, and a dust cover is included to protect the finished model. The kit is made from durable plastic and metal, with an estimated build time of three hours (longer for beginners). It encourages creativity and problem-solving, making it suitable as a gift for holidays or birthdays.