in order to skip the usual "tl;dr" comment, will post here a bit more detailed suggestion:

About the Egg contest:
Each easter plot will have an already made plain egg, that is quite empty from the inside, and the best eggs would be the best colored, like in a pattern or such, or in a creative way(Jackster hatching from an Egg, totaly creative), the egg could be quite transparent and have something inside, as long as it's easterish, and not just a pure glass egg.

As this might be a short delay, and easter is not such a big holiday, it won't matter if the contest will be finished after Easter, or at the end of the month, and either way, the egg is already made, mostly just need to color, so the process is shorter.