I don't know what I was thinking about keeping boys occupied for a week dying eggs. Two moms, two boys and a girl went through 3 1/2 dozen eggs and two egg dying kits in about 2 hours. And that included the time it took to send the kids to a convenience store to buy an extra dozen eggs and boil them.
As always, the most beautiful is the unexpected, like Marco's transparent wax cray on a light brown egg dyed green (above). Or this:
Apparently Staedtler changed their ink formula, because the pen I just bought is permanent on paper, but not eggs. I just can't believe their lab didn't test it on eggshell! Anyway, just in case you want to try it, a better choice is the Faber-Castell PITT artist pen.
I remembered a friend's tip that you can exhaust the left-over egg dye and color protein-based (wool or silk) yarn with it. So I had some fun with that and turned my hands a really unlovely shade of monster green in the process. I'll try and post the results soon. The yarn results not the ugly cuticles.