Montessori grammar stencil

A stencil with the symbols used in Montessori classrooms for sentence grammar exercises. I used this stencil to force me to learn how to create objects in OpenSCAD. The stencil is playing card size, and has rounded corners. The OpenSCAD file is available for download and customization.

* Large circle (red) => verb
* Small circle (orange) => adverb
* Crescent moon (green) => preposition
* Small rectangle (pink) => conjunction
* Keyhole (yellow) => interjection
* Small equilateral triangle