refering to your last Home time from 1.4.: dear Rebecca and Megan, here is an example for blown out and by kids painted eggs. (not part of the contest) They are put up on forsythia twigs (in bloom) or twigs from decorative almonds in bloom. The most detailed egg decoations in Germany are made by the sorbians https://en.wikipedia.org/wiki/Egg_decorating_in_Slavic_culture.
My contribution for the physical warframe eggs:
colored hard boiled eggs - "decolored" using lactic acid. Includes: 3 kubow eggs (orange), corpus hacking puzzles (green and yellow), corpus and fortuna symbo