I found that building my crank was very challenging for many reasons. I lost a few of the pieces and had to make them out of paper. I also think that the pieces got stuck a lot in the holes so they had to be fiddled with. Those two things made it much harder. I do think that even though it was challenging, it was fun. I put a little polar bear at the top and it finished the whole thing. Luckily, it worked even though there was a lot of editing. I think that it does help to know this because it is important in life. I would probably do this again.