Free woodworking plans and advice for the novice to intermediate woodworker.. Interested in learning how to build a kayak? see how easy it is with our kayak boat plans for the plyak 12, a simple to build, unsinkable single kayak.. Intro: sawfish, an unsinkable, lightweight, foam kayak (23 lbs). free diy kayak plans, the hardware store boat. do you really want a kayak? want one so bad you can.