I never thought I would be advocating for a beat box generator but this is really fun and creative. Essentially you drag and drop (it is very intuitive) and before you know it you have an amazing, custom, professional beat box song. I am so not into beat box that I don’t know if beat box is spelled with two words or one word (beatbox).
Regardless, try it out and have fun. The only bad news is it takes some time to load. It is well worth the wait.