Hot and Cold Whisperer is a playful wearable interface for finding WiFi hotspots in the urban environment inspired by the well-known hot and cold game. The hot and cold game is normally played by multiple players: a player searches for a hidden object whereas the others yell out the words “hotter” as he gets closer to the object and “colder” as he moves away. Hot and Cold Whisperer, designed in the form of ear warmers, converts this game into a personal urban experience for the user who is in search for a WiFi hotspot. Jona developed a concept for a performance with the Hot & Cold Whisperer (by Ebru Kurbak) in public space. The environment was observed with the ear warmer and colored balloons filled with helium were attached to the ground, whereas the colors were decide by the device. The installation visualizes a snapshot of the wireless network space.