Multiplication table for easy finger tracking

My nephew who is just learning multiplication had trouble using the multiplication table on paper. When he tried to track rows and columns to find the results, his finger would easily slip in a different row or collumn.

This is a simple multiplication table which has dents in rows and columns which act as a guide for the finger in order to make it easy for kids to find the result by tracking ther finger through the guides.

In order to have the numbers show in different color, I have sliced the STL in a way that there is a single layer (0,2mm) with color change. You print bottom in one color, switch the fillament to different color (i.e. red) and then after that layer switch back to the original color.