In the frozen shadows room, visitors can have their own shadows captured on a white wall and examine them in detail afterwards. Staged fights and hopping and jumping over one's own shadow are especially popular images in this room. How are the shadows frozen? The wall is painted with phosphorescent paint and can therefore store light and reemit it over a long period of time. The wall is continuously supplied with new light by a bright flashgun that lights up every few seconds. If a visitor stands between the light and the wall, the flash of light fails to reach the wall, creating a black shadow - until the next flash.

Waves are all around us and indeed inside us, without us noticing a thing. Some are reflected by our bodies, while others penetrate them. Only a tiny fraction of these waves are perceived by our senses. Heat waves glide over our skin, light waves make objects that scatter light visible, and we hear sound waves. At a 7-m-long coil spring, visitors can learn about the properties of waves: Anyone who nudges the spring will see how the effect is transmitted and reflected. The energy travels along it without any parts of the spring moving from their original location. This is also the way in which sound propagation and radar work.