Many of the currently available multi-agent frameworks are purely intended for research purposes and are as such not very suitable for implementing agents in physical robots. This paper describes an attempt to built an extension for one such framework that enables us to use it for implementing physical robots.

The *Jason* framework provides an intuitive and easy way to implement advanced Multi-Agent Systems. Being highly customizable, it enables the user to easily represent models of artificial and real scenarios. However, there is currently no link between real world agents (such as robots) and software agents (implemented in *Jason*).

The Lego Mindstorms NXT is a robot built in Lego. It includes several actuators and sensors, which potentially gives unlimited possibilities for building advanced robots. It comes with a drag-and-drop programming interface, which makes it impossible to exploit the potential fully, however by installing the LeJOS Java Virtual Machine on the NXT, the robot is able to run programs implemented in Java.

A combination of the *Jason* framework with Lego robots having LeJOS installed, could result in an easy and efficient way to implement real world multi-agent systems.

This paper describes how to implement Lego agents using the *Jason* framework. While having 