For the Breuninger flagship store, one of the largest privately run chain stores, Tim John designed interactive, motion-adaptive Christmas shop window displays in cooperation with Pia Kuhlemann (graphic design) and Markus der Seriis (mechatronics). The children windows could be set into motion with the help of a crank. Winding of the crank influenced the direction and the speed at which to turn, thus creating various actions and sounds in the shop window. The faster the viewer turned the handle, the faster was the tune and the movements in the shop window. It required a lot of skill to keep the tune at the right pace. Other windows were operated via a touch sensor thus getting a small choreography going.