The protective attachments of the present invention provide protection that removably attaches to the bottom of the foot, hands, elbow, knees, shins, and animal pads, in a snug tight fit, and that conforms to the contour of the body part covered. The system can further comprise additional bases adapted to other uses such as strollers and infant swings. The address electrodes and the base plates are formed alternately. A ratchet member is fitted in the second recess and provided at two ends thereof with two wedge portions configured to be fitted in an angular region between the inner wall of the space and the socket member. A current mirror having first and second current paths is included. The lens is transparent and dimensionally stable at a wall thickness of 0.