How to build a boat, wooden boat building methods for the diy, backyard, self-builders explained, carvel, lapstrake and plywood. Want to teach children about italy? find engaging activities and crafts for children of all ages including toddlers, preschoolers and kindergarten kids.. Iris folding. iris folding is a paper craft technique that involves folding strips of colored paper in such a way to form a spiraling design. the center of the design.