HP Robot Otto Expansion Sense Builder Kit HP-RO SENSE BThe Otto Expansion Builder Kit includes all the 3D printed plastic parts required to build an Otto robot. Just open the box and start building right away. The kit explores sensor applications through a series of modules that collect data from the world around the user. Otto robot expansion kit for use with the Starter Kit (sold separately) Sound Sensing: Otto robot will react to noises and claps Temperature and Humidity: Climate Duo will allow the