Ill second this recommendation, its fab! I want one for B, SD is kindly buying him one for his birthday in January! 
Corinne, Im not sure there would be any benefits but I think the recommendation is more for the dog than the playdoh that comes with it. Also, if people are asking for present ideas for him, I wont suggest to them they make playdoh for B to play with, but I can direct them to Argos 
Bobby - January 2007
M/C- October 2008, March 2010, May 2010, July 2010
*I am EmmaS but Hitched has taken me back to my old user name for some reason!*