This week we have been working on a mechanism called a cam. We made them out of paper and we are just practicing to make one for the real one. You have to cut out the pieces that we got for the project. Then you have to fold it on the dotted lines. After you have done all of that you glue the pieces together, then look at the directions and put the pieces in order of the directions. Then it will work like the directions say if you did the right things.