remix of Math hatten with 4mm x 10mm cuts so map magnets can be used to hold buildings together.

This is a remix for the Math-hatten buildings with 4mm x 10mm cuts so that map magnets (4x10mm) can be inserted and used to hold the building parts together.

Building tip: make sure you are consistent with magnet polarity as you push these into place. For example: Always keep north pointing up and south pointing down with respect to how the building is oriented when it is assembled. In short, set your magnet poles such that the building parts attract (rather than repel).