Watch the video below, read the supporting materials (also below), view the slides (yep, also below), and provide your responses to a brief case on this topic by downloading and editing a google doc.
SO this guy figures out how to make a bike out of cardboard for around $9 for materials. <write, elaborate, inundate.../>
$9 cardboard bike slides, strategy-level lens
$20 cardboard bike runs into obstacles (Fortune.com, 2013)
Here's the link to incorporate your responses --> LINK. Follow the instructions at the top of the document to fulfill "mechanical" requirements....