diy ocean diorama made from a blue-painted egg carton filled with sand, seashells, pebbles, octopus, jellyfish, seaweed

ocean diorama diy craft handmade recycled upcycling sea underwater marine octopus jellyfish coral seaweed fish sand seashells pebbles creative art decoration summer aquatic ecofriendly environmental sustainability paper cardboard blue pink background design children shell tropical beach coastal artistic fun hobby