An apparatus for conducting demonstrations of the softness properties of consumer products and other materials, plus a method for conducting such demonstrations, is provided. The main body portion includes a motor unit. The focusing coils are placed on the two sides of the lens holder, and the current in the focusing coils is perpendicular to the optical axis of the lens. A bias urging assembly is disposed for urging the movable element in one axis-perpendicular direction to the stator.