SumBlox / NumBlocks (improved Number 4)
thingiverse
The first steps of learning numbers must be haptic, easy and fun. by comparing the hight of each number you can easily visualize the value behind an abstract symbol - namely the roman numbers we all know and love (more or less). So the first operations (add & substract) will become understandable. my files are strongly inspired by: https://sumblox.de/ so if you live in germany and like the original, go and buy it out of high quality wood for me it was a neat lession in drawing in fusion360 ontop of a picture
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