Many thanks scooterx3 and westfw for your kindly comments! I did not see them till today 
Yes, they are lasser-cut, as the robots and the whole Multiplo building system, and the case for our DuinoBot. We are right now very very bussy, but will enrich the website as soon as we can (I think by december), and will release all the sensor libraries, as I told.
Regards!
Julián