Take 5 of the cucumber halves and scoop out the seeds and flesh leaving walls of skin and flesh about ¼-inch thick. (These will be the canoe hulls.) Scoop the seeds out of the 6th cucumber half. Slice it lengthwise into 5 long, slivers. (These will be the outriggers.)
Split the ribs into slivers about 6 inches in length. (These will be the spars.) Split