Ironclads of Hampton Roads, Civil War Naval Battle

My 4th grade students are learning about using Tinkercad in math. I made simple versions of the ironclads from the Battle of Hampton Roads at a 1mm:1 foot scale for the hull. Most of the measurements for the forecastle, etc, are simply eyeballed from old photos and diagrams.

These models will be examples for using scale to represent something very large, and the class will troubleshoot what they think should be improved when they make their own scale models.