Here are a set of Platonic dice. Five stl files and the five openSCAD programs that created them are provided. Each openSCAD program contains a module that makes a rounded Platonic solid. Variables are an overall scale factor and a radius for rounding. One of polymakers fonts, thing:13677, ArchitectsDaughter, was used to label the surfaces.
Dice are a popular topic on Thingiverse. A search using "dice" yielded nearly a hundred hits. Most of the dice have sharp edges but thing:29055 by KillerGardevoir is a nicely rounded set which rolls well. As the rounding radius of the Platonic dice is increased a point is reached where they resemble KillerGardevoir's dice. Further increases turn the Platonic dice into near spheres.
I printed the dice directly on the build platform with a modest amount of infill. They are small objects which print quickly.