Instant Topiary -- Or make a living heart from a long growing potted vine plant, using heart shaped wire snugged into pot and then carefully wrap the vine/vines around/in&out wire and allow it to continue to grow that way, w/your help now and then ---
Nicer than a shade sail over the pool? This is a good summer shade idea. Clip on in the summer, clip off in winter or bad weather. Could run between two permanent shade structures, or between two parts of the house.