It's kind of interesting to see an inventor's reaction to a first invention. In general, they are way overprotective and secretive about the whole thing thinking that others may steal it and reap untold riches.
My first invention was a 12 sided Rubik's Cube type puzzle in the shape of a dodecahedron. I made a prototype completely by hand (way before I ever got machine tools) and it worked fine. I designed all the inner workings the old fashioned way; in 2D on paper. I had a patent search done and all was clear. I was ready to file the application, when that month I saw the same exact design in Scientific American and Omni magazines. I was both devastated and somewhat proud that I'd done the same thing on my own. I was probably around 18 at the time. I designed another series of puzzles that were completely different and went ahead with a patent on one of those. I then contacted each and every toy company that I could find. They would all have me sign their contracts, which essentially said they agree to look at my idea, but can't guarantee that they are not working on the idea themselves. They were very one sided in favor of the manufacturer. The contracts scared me so much that I didn't want to work with any of them.
With the benefit of hindsight, I would have been better off to take my chances with each and every one of them, and focus my research more on how those manufacturing companies could make money with my puzzle rather than the workings and the mathmatics of the puzzle itself. I was spewing out facts like one of the 4 puzzles had so many combinations possible that if each combination was represented by an iron atom, the number of combinations would be represented by a sphere about the size of the orbit of Jupiter! Of course, having been a manufacturer now and seeing things from their perspective, I should have done more part cost analysis and definitively shown how much they could profit by manufacturing such a thing. If they can make money at something, and there is relatively low risk and tooling expenses for them, they are much more willing to go for such a deal. The patent really didn't have much to do with that part. It could have all been handled with contracts instead. That needs to be the primary focus for it to work; how can I make this manufacturer rich, and in the process, do well myself with a fair and equitable contract.
This was a lesson from the School of Hard Knocks that I offer free of tuition.