I use the Hummingbird Robotics kits with middle school students in my Creator's Studio elective class. To help protect the board, I designed and printed a chassis for the hummingbird to sit inside. It has openings for the USB and power cables, and is short enough to allow all of the wires to connect to ports at a 45 degree angle. NOTE: This chassis is designed to work with the original Hummingbird, not the Duo.
To learn more about hummingbird, see http://www.hummingbirdkit.com/
To learn more about Creator's Studio, see http://www.creatorsstudio.org/
The chassis was designed in Autodesk 123D. I printed the one pictured on a Makerbot Replicator 5th Gen, 10% infill, raft no supports, .20mm layer height.