Take the idea that cliff - dwelling birds lay conical eggs that roll in a tight circle so they don't fall off the cliff; or that clutch size dictates what shape of egg would make incubation more efficient. (newscientist.com)
Carve, (or if using chips, slightly melt and mold), the white chocolate into the shape of an egg and use a chemical - free dye. (yummyplants.com)
If you just want certified organic chocolate but you're not fussed if it's in the shape of an egg, a bunny or a bilby here are some more chocolate makers (austorganic.com)