This is a unique way to corral your beachcombing finds - shells, sea glass, driftwood. Any design would work but I like the lined design of like elements. I don't know if the "A" was found on the beach but its inclusion is brilliant.
Rock painting has become very popular these days. Pick up rocks and paint them in the pattern of cactus, arrange them together with some natural rocks as you like in a flower pot for a stunning homemade centerpiece!