The Great Ball Contraption Marble Run is assembled from 2,438 pieces building block parts and has colorful paper instructions to help you easily assemble it. And this marble run building kits looks stunning on display, simulation of a real roller coaster. The size over 29.7” long, 23.4” high and 7.9” wide.

Mould King building blocks are made of high-quality ABS materials and carbon fiber materials, with a high level of safety, one-time precision casting processing. It is designed in accordance with common standards and can be compatible with your existing brand toys. All parts are easy to assemble and will not fall apart.

Our marble roller coaster toy mainly made of hyper speed motor, 1pcs M motor, 1pcs lithium battery, 9pcs marble rolling balls, and a lot of building blocks put together, its structure is stable, exquisite appearance. Help promote children's imagination and creativity, hand-eye coordination and self-confidence.

DIY marble run roller coaster building blocks kits is a cool model toy, suitable for parent-child activities and family entertainment, and also a new set that can be added as a collectible.

Mould King building block sets for kids, teenagers, adults and collectors. Since the packaging process of the product is fully automated, if you find any parts missing or damaged products in during the assembly process, please contact us in time and we will resend them to you for free.