Rolly is my second "Beam-like" Robot. After "Volvo" a lot of persons show great interest and asked me how to build it, this time I made a "Step by Step" pictures book you can see on my Home-page at : http://perso.wanadoo.fr/re-re/ The Robot is an easy and convenient Platform for all kind of electronic, it's cheap and fast to build and you can easily modify it for your own purpose! Email: RE-RE@wanadoo.fr