Moving Bird

For my bird I used a full rotational servo and a type of sliding crank. I put a button in the back of the cigar box in which it is housed which will turn it on when it is pushed and turn it of when it is pressed again. The main problem I encountered while building it was that the crank would slide up out of its designated area, getting stuck in the wood pieces meant to hold it down, and would therefore get stuck. I put some more "beams" to push the crank down whenever it started to come up. With that in place, the bird slides smoothly forwards and backwards.

ANY SOURCE HERE