Some sea glass beaches
A personal favorite from my Etsy shop https://www.etsy.com/ca/listing/470090349/wedding-8-by-10-pebble-and-sea-glass-art
Cute fishies in a frame
8 by 10 lighthouse made with pebbles and sea glass by by PebbleArt
Something like this with sticks at various levels being balanced by sea glass or something hanging from them.
Sea glass necklace seafoam green blue petite by estherdobsonart