shellebration
Da noisy to-do dat someone who gathered lots of nice empty invertebrate-exoskeletons makes when gleefully showing off his collected treasures to his family and friends.
Happily displaying your assorted seashore-finds is great in and of itself, but if you also traded other beachcombers for some of their prize sand-dollars, conches, cowries, and swirly-pearlies, that is even more cause for a major shellebration!