What do we really have to own and what are we able to easily share? How often do we actually use our power drill? How many vacuum cleaners does an apartment building need? Pumpipumpe makes all the useful things which are rarely used that are hidden in homes, cupboards, boxes and basements, visible. The mailbox stickers draw attention neighbours who pass on a daily basis. The goal is to create a dialogue between neighbors and discuss the potentials of urban neighborhoods being real active networks, especially in the age of increasing digitization. Pumpipumpe is not a ready to use product but a tool that can and will help you activate your own real network in the neighborhood.