Escape from the rotary tower with Castle Escape. Watch as the marbles trip their way down each stairway and shoot out onto the rail. To celebrate their escape, they will ring the three hanging bells. Brings new dimensions of sight and sound to your marble runs. Helps to develop spatial thinking and an understanding of science, technology, engineering, and mathematics (STEM) principles. Praised by the Wall Street Journal as the perfect toy for teaching children how to code. HaPe