I've been wanting to make these gorgeous hot rocks that Blair did with her kids for a while now, but we're waiting for the snow to melt so we can go rock hunting. In the meantime, I thought we'd give it a try on hard-boiled eggs instead! We hadn't done any egg-dying for the Equinox, so these were a quick remedy ;)
We hard-boiled the eggs first, then put them in a 350 degree oven to keep them hot. You must use tongs or a hot pad to remove them as they get VERY hot to touch. It was easiest to rest the hot eggs on the empty egg carton to keep them from rolling around.
We focused mostly on the "upside" of the egg since it's awkward, hot and messy to pick it up too much. It's very satisfying to see the crayons melt as they touch the egg, not to mention the nostalgic smell of warm, waxy crayons! I shaved some of the crayons with a paring knife and the kids used the shavings to sprinkle on top.
After they've completely cooled, you can give them a coat of Mod Podge to keep that "just melted" wax look ;)