Features: Easy to Assemble, Store Play: Quick-snaps track pieces make setup and cleanup simple. Detachable design is perfect for storage and travel, ideal for solo-fun or parent-child activities. Safe, Sturdy Perfect Present: Made with quality, child-safe materials and strong magnets. Great for developing creativity, coordination, and problem-solving. An ideal present for birthdays, holidays, or special occasion. Rail Cubes Monorail Set offers an expanded block collection for more intricate and complex track designs. Create multi-level routes, and imaginative twists, while the mini trains glides effortlessly along the tracks for an engaging and dynamics play experience. PERFECT PRESENT FOR KIDS: A fun, educational toy that grows with your child. Preschoolers can develop hand-eye coordination by building a basic-road system, while children over 3 years old can use the magnetic track to create more complex patterns. It is a great present for birthdays, for Easter, for Christmas, for Thanksgiving or other holidays. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Sizes: 67pcs, 83pcs, 121pcs, 65pcs, 123pcs, 166pcs Package List: 1 Set Electric Trains Building Blocks For Kids