Conceptual models are those models that explain concepts such as the dissection of a cone and other concepts used in plain and spherical geometry. Learning systems, are the most advanced forms of model. Examples of learning systems include everything from toy automobiles, airplanes and boats that can move and construction sets such as Erector, Mechano, Lego and Fischertechnik. A committee has been formed within the Science and Engineering Division of the National Federation of the Blind, to address the issue of technical toys for the blind. The purpose of the committee is to create sets of instructions for construction toys, suitable for persons who are blind.
Blind people can work with construction toys if they have accessible instructions.