Custom Creator Expert Roller Coaster Building Bricks Toy Set 4619 Pieces

This set is fantastic! What I love about it is its impressive construction and large size, as well as its functions so perfectly. Sometimes, the chain may slow down if a cart gets stuck, but aside from that, its design is incredibly ingenious - one twist leads directly to the coaster's top, and all the wheels work smoothly while in motion. Honestly, I'm amazed by this incredible set!