A cheerful boxer crab and hermit crab share a geometric glass terrarium filled with coral, seaweed, and sandy ground against a soft pale yellow background. The illustration combines playful character artwork with naturalistic ocean elements, rendered in warm coral pinks, ocean blues, and sage greens with delicate line work defining the glass container. Printed on smooth white card stock and made to order, artwork on the front, blank inside, envelopes included in every set. A handwritten note that arrives as an independent artist's work.