Drawing I - Trains..

This term I am taking Drawing I. Our assignment this week may sound a bit complicated (because it is). We have to create a 1' x 1' x 2' box out of foam core or cardboard but we cannot use glue to keep it together. Next we create a train that will fit in the box and we will assemble the pieces in class in 8 minutes, again without glue, but with tape, wire, string etc. After we assemble it, we draw it! So far, I have part of the train made and I am worried about how I will be able to assemble it!

This is the train I want to create, it may seem familiar ;)