The easiest thing to do is to sketch it on a piece of paper and show it to someone. Thats perhaps one of the most basic ways to validate a concept. I've read

The easiest thing to do is to sketch it on a piece of paper and show it to someone. Thats perhaps one of the most basic ways to validate a concept. I've read some stories where an entire app was sketched on paper and demonstrated to other people by moving around the pieces of paper. If people can easily grasp the idea, find people to partner with. There are a lot of great developers willing to contribute to a project if they see value. However, you will need to contribute something as well as an idea is worth $0. But if you have some talent (biz dev, design, etc.) that would be your contribution to it and it won't cost anything.