Number Learning Tool

I made this ruler for my son to teach him addition and subtraction within ten. I call it a kid's calculator and with it he solves tasks much more fun :) He colored the numbers with a marker to make them more fun - that's up to you.To find out how much 3 + 2 is, set the moving window to 3 and take two steps to the right. Done. I use the Orca slicer, but to earn more points I attached the Bambu Studio profile with printing by parts. There are no special settings in the profile, you can use your favorite profile by importing stl or step files into it. I printed my model with a layer thickness of 0.28 and it was fully functional, there are no small details, choose as you like. The child does not pay attention to such trifles. The fusion project is also available, you can change it as you like. Questions, wishes, ideas are welcome!