After fooling around in the kitchen for a while, I spread a thin
coat of melted chocolate, paper thin, on a sheet of wax paper, smoothed a second sheet of wax paper over the chocolate, then rolled the whole thing up into a tight roll and slipped it into the
fridge.
They did dye my hands slightly yellow... And
after a day in the
fridge the two leftover balls had a different texture, with the chia seeds
coated in a bit of gel - like stuff, from absorbing moisture, I assume.