·A tough handcrafted Marble fortress with 227 building pieces and 10 marbles

·Intricate system of cogs, gears and wheels,full of crazy twists and turns. Consists of a tower distributor, spiral slopes, a crane lifer, a wheel lifter, a short slide and small switches

·Learn principles of Science,Technology, Engineering and Mathematics(STEM)

·Pre-cut wood sheets，easy to assemble

【ENGINEERING MARVEL】Based on great human engineering, LG504 combines the beauty of science and machines.Build your own set and wathc the marbles go crazy down the slopes and turns. It will create loads of fun and inspiration for you.

【REWARDING CHALLENGE】Highly satisfying and educational building experience. It requires dexterity and imagination but will also improve your understanding of STEM principles and kids’ motor skills. A brilliant way to tease your brain.

【IDEAL GIFT& HOWE DECOR】Perfect gift at any occasion for all ages: for quality time,birthday present,pastime, etc. Detailed design and attractive appreance also make it a unique decor to your home.

【NON GLUE& NATURAL MATERIAL】Lightweight models made of natural plywood. Precise laser-cut wood sheets with well-fit parts. No glue needed, easy to assemble together. Non toxic materials ensure you a safe building experience.