When it comes to a fresh point of view, nothing can rival an actual monkey. Monkeys are guaranteed to exercise every bit of interface you expose. Now monkeys are hard to come by. If you lack one the next best thing is a two-year old human.
I have two-year old twins girls, so I decided to give it a try. It was surprisingly easy to get them to play with the software. (I did tell them there was a pretty bird hiding somewhere in the trees.)
Did they find any bugs?
They found several bugs I had not seen before. Most were about camera collisions, and there was one really nasty synchronization bug with a garbage collector. That bug alone was worth the experiment.
And there is also proof you can advance a software project and look absolutely adorable in the process.