Just stick a few long bolts and matching nuts and washers in a bag. They screw them on and take them back off. They try to see how many nuts will fit on one bolt. They can make a pattern (one washer, one nut, one washer, one nut).
Sail boat / pirate ship in dramatic play Ship wheel: cardboard cut out, wrapping paper tube (and Knut bolt and washer to make it spin) Sail: wrapping paper and tubes large roll paper Inflatable tubes, pails and shovels, fish and fishing poles, towels, leis and paper towel roll binoculars/telescopes