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!
Put a picture of the beach you visited in a shadow box frame and fill the bottom with sand from that beach. Much neater than a random jar of sand and shells! decorate the frame or put seashells or treasures found on the beach in the shadow box