This topic, yet again, is supposed to help the newbies of the platform.
My proposal is simple; Math blocks that will mutate into specialized dials on insertion into different blocks.
For example, when inserting in into Make a color, it will turn into a dial ranging from 0-255; for Player.Sound, it can be 0-100; for ImageSprite.Heading, it could be a complete dial, from 0-360 (degrees).
This could also be a toggleable feature in the settings, for those certain individuals who wish to not use it.
Maybe this could be featured in nb200 or something like that?
Also, I'm pretty sure http://blockly.games features them...