I'm really impressed; they're all the same size! Did you use something to help size them out and cut out the dots? Even with help I'm not good enough yet to make a set of anything this consistent. Anyway, they're adorable and I really love the colors and how they're arranged! It's just so perfect!
No, I do few balls of different colors and then model all cubes. You have to be a bit careful when you do the hole for not deform them. Ah, a council, to do better the dice, the polymer clay has to be cold so the edges will be sharp, then if it becomes hot you put it in the freezer two minutes. For dots, the same thing and a bit of patience