That's not my idea, but it's my version of a dice with googly eyes. With the scad file you can generate two different dices, one is a intersection of a sphere and a cube, the other is a hull over 8 spheres. I prefer the last one, because it rolls better.
I printed my one with a length of 40 mm and for googly eyes with a diameter of 5 mm. Printed with wood PLA.