Gosh George, we all know what is is the meaning of the word “model” in science, technology and art. But these models are used as representations of real world in order to facilitate understanding of the phenomenon or object in question. You will not be able to defend anything by referring to the scientific use of the word “model” since the objective of their creation is different than “pleasure” and “play”.
(Actually, there is also an expression “toy model” in physics, used to refer to unrealistically simple models and “playing with models” is what PhD’s are usually asked to do… )
But you need to read more than the first sentence of the very page in Wikipedia which you cited:
“Physical models in science and technology allow us to simulate or visualize something about the thing it represents. A model in this sense is a physical object such as an architectural model of a projected building or an existing one. Possible technical uses of an architectural model is to facilitate visualization of internal relationships within the structure or external relationships of the structure to the environment. Other uses of models in this sense are as toys.”
Now “toys”, are also defined in Wikipedia, ( http://en.wikipedia.org/wiki/Toy ) as: “A toy is an object used in play. Toys are usually associated with children and pets, but it is not unusual for adult humans and some non-domesticated animals to play with toys.”
I tend to agree with this definition, as it covers all the railroading actitivies of mine and my friends from Kichijoji and Susono clubs (in particular the reference to non-domesticated well applies to Susono members;-), perhaps better in a slightly modified definition, to “non-domesticated adult humans and animals”;-)). But “toys” does not necessarily imply “cheap and cheerful”, the toys they play, generally start with cheaper makes such as Aster or O.S. , but end with Doringsha and various one off pieces of value comparable with top models of BMW or small family house in Japan.
Best wishes from Tokyo, Zubi
PS Mind you sometimes these toys do useful work too! Pulling a small train with children.