Spelaion offers the public to explore and interact with an ever-changing surface. This surface, made out of a new and intelligent material, hangs from the ceiling. The public is invited to enter the space underneath the surface and interact with the material by moving. Together, people influence the surface and create shapes that simulate geological formations found in caves. Each individual interactions add up to create a collective piece. Spelaion offers a reflection on the effects of time and renders noticeable movements that usually occur over decades. By letting people interact with such events, Spelaion questions our own impacts on the environment and our relationship to nature and matter. This opens up opportunities for innovation in product design, home design and urbanism. In the digital age, it is important to rethink the way we design and use the products we use