This "Lego" pen is not lego at ALL. The elements are not lego, nor is the "minifig". The hands and arms of Yoda are made of cheap, thin plastic. The head has a stud on the top and will not fit on a normal LEGO minifigure (the head fits the neck but will not go on all the way). The torso and legs are not LEGO sized either, and will not work with other LEGO pieces.
The pen part of this toy, however, is very good quality. It writes very well and has a good grip.
Overall, I would not recommend this to any kid or LEGO fan, unless you are a Yoda collector and are looking for a cool looking pen.