Looking for the ultimate marble run? You’ve found it! Many of our customers have repeatedly asked us to build an even bigger and fancier self-assembly wooden marble run 3D robotime puzzle. Here it is! Pieces: 294 Assembly Time: 7H Difficult Level: Assembled Size: H: 12.8?(32.5cm)W:8.4?(21.4cm)D:9.0?(22.8cm) Match numbered wooden pieces with visuals in our manual. Builds logic and motor skills, fostering patience in kids Perfect for special occasions or as a unique decor item. Share and showcase your finished piece withfriends and family. Robotime Puzzle LGA01 Marble Night City 3D Wooden Marble Run Packaging size: 12.48 x 9.17 x 1.89 in Assembled size: 12.80 x 8.43 x 8.97 in Wood pieces: 294 pcs Item weight: 2.90 lbs Assembly time: 7 h CTN size: 21.06 x 13.39 x 10.04 in qty/ctn: 10 pcs G.W./ctn: 30.36 lbs Robotime-ROKR Marble Night City is based on great human engineering. This marble run product combines the beauty of science and machines, involving so many small gadgets. It is a self-assembly 3D wooden puzzle with Tower Distributors & track race balls. Build the set and crank the handle. Watch marbles run crazy down the slopes and twisting turns. Breakthrough material restrictions and incorporate high-transparent acrylic. With a funnel-shaped track, the total length is extended to 2.5 meters. Rotate the handle, the steel ball will reciprocate along the track to experience the creativity of precision machinery with this wooden marble run puzzle.