3D Designed Coin Sorter STEM Lesson

I published another STEM lesson for lower elementary school on Thingiverse.  This is a gravity fed coin sorter. I did this lesson a few years ago in the second grade, and the kids used poster board, rulers, and horribly dull school scissors.  They improvised layering tape over the poorly cut holes, and a few of the kids got them to work. We taped them onto the wall and tried them out.  This is the 3D printed version of the iterative process. 

I have access to a very small 3D printer, so I had to print the two designs in two pieces each, one top and one bottom.  The design with the holes worked well considering I did not have the bottom printed for the video.  The design with the pegs did not. My measurements were off just a bit, so the coins didn't pop off like they were supposed to do.

I used the U.S. Mint's reference sheet for sizes of the coins.

Here is the link with the STL files, and lesson plan with YouTube videos of example gravity fed coin sorters.  https://www.thingiverse.com/thing:3023073

coin_sorter_gravity_fed_lesson_plans.pdf
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