angry monkey pop-up card

I had an idea about how to get the double doors to work but I wasn't sure it was the best idea. There seemed several ways to go about it. I made one but wasn't completely happy with it. So I made another from an entirely different approach, then another from yet another approach. A fourth and fifth approach failed, finally after some twenty attempts at getting something smooth and nice, all failures, I finally resorted to the original idea -- the actual original prototype. Near the end I was beginning to get sick of the thing. Honestly. I do not want to see another monkey again.  

Second monkey

Third monkey