I made cicada Christmas lights using some LED USB Christmas lights, and some plastic cicada whistles from Australia. The song of cicadas heralds the Christmas season in many countries in the souther hemisphere like Australia.
Bonus Christmas Cicada stuff:
There is a cicada nicknamed the Kobonga Christmas Clanger in Australia (thx David Marshall and Kathy Hill ):
How about a cicada Christmas Wreath?
Or a Cicada Christmas Card from Sam Orr: