Ok, I did these for the Ostara swap, but any spring egg festival works… Apologies for the picture orientation; my phone & the forum are having an ongoing argument about what side is up.
These are brown eggs from a friend’s chickens, so probably a little sturdier than bleached grocery store ones. Anyway, I peeled off the tops carefully when I used them, rinsed thoroughly, and dyed them with some food coloring. No good pictures of that, but you’ve probably dyed eggs before…
Ready to make candles! I cut rings off a toilet paper roll to hold them upright, got out some wick, and large seed beads for bottom weights since I didn’t have any small wick ends.
Filled with soy wax!
Oops… 
Wick trimmed, ready to burn (in sand so it can’t set anything else on fire…)
…and this is why we have sand! (also why I kept the ones that were cracking down the sides.)