This board allows you to count points from 0 to 999, forewards or backwards- Can be used for games like darts, Phase10, Wizard etc. or just as a simple machine for adding numbers.
The board is assembled from 6 parts, no glue needed. The three rings move freely, there is no mechanism for the carryover.
You could put a magnet in the opening inside, in the middle, or put markers etc. in the hole in the middle.
You may use the slicer to put additional elements on the frame, or change the numbers to symbols or whatever you like using Fusion.
The author marked this model as their own original creation.