My eldest son is always attempting to explain his conception of an invention he has thought of. He makes simple drawings to explain how he thinks it will work. Then he goes on to tell me that he would have to invent a part or adapt something else to make it work. I usually like the ideas he comes up with but wonder if he will ever take the next step and make a working model of his ideas. If he ever does I think he will get very rich producing and marketing his ideas or selling them for a royalty.