The funnel expansion includes a total of two funnels, along with track elements, building blocks, a base plate, and four balls, as well as a manual with two assembly suggestions. With this set, a small standalone marble run can be built, or the components can be integrated into a larger marble run. The modular and compatible marble run, where nothing wobbles or slips, teaches spatial imagination and introduces basic physical laws. Whether with or without assembly instructions, the colorful construction promotes adherence to sequences, stimulates working memory, and trains analytical thinking skills.