Is it valuable to design a toy patent yourself?

Here's the thing. If this is particularly interesting, do it yourself. It is protected by patent, and your project is valuable only when it is big.

The other is that if you sell it to others, it depends on your patent. If it is an invention patent, finding a suitable company can be worth some money. If it's a practical model, and the asking price is too high, people don't want it.

Because there are too many patents now.