The blocks are based on Montessori blocks I've seen in my kid's Kindergarten. Each block is as tall (in centimeters, but you can scale them as you like) as its number implies. By associating the block's height with their corresponding numerical value, children can visually compare and differentiate between numbers. They can physically stack the blocks in ascending order, reinforcing their understanding of number sequencing and even turning it into a fun exercise.

It's possible to explain the 4 basic arithmetic operations with these blocks.

I suggest printing with wooden filament to be as true to the original as possible, I didn't have any at hand unfortunately. But of course you can use whatever you like.