This paper presents the first version of a Wireless Sensor Network design and simulation tool, called CupCarbon. It is a multi-agent and discrete event Wireless Sensor Network (WSN) simulator. Networks can be designed and prototyped in an ergonomic user-friendly interface using the OpenStreetMap (OSM) framework by deploying sensors directly on the map. It can be used to study the behaviour of a network and its costs. The main objectives of CupCarbon are both educational and scientific. It can help trainers to explain the basic concepts and how sensor networks work and it can help scientists to test their wireless topologies, protocols, etc. The current version can be used to study the power diagram of each sensor and the overall network and also to simulate "destructive" insect movements. The sensor programming is done individually in each sensor as it must have its own communication program. In this version, only sending or waiting commands, and mobility on the OSM map are implemented so far. The power diagrams can be calculated and displayed as a function of the simulated time. Prototyping networks is more realistic compared to existing simulators.