Sawfish, the Unsinkable, Lightweight, Foam Kayak, Free DIY Kayak Plans, Anyone Can Build : 34 Steps (with Pictures) - Instructables
Boat Designs made from Coroplast and corrugated plastic sheets
Fold-up Kayak Plans PDF
Amazon.com : Oru Kayak Foldable Kayak Bay ST | Stable, Durable, Lightweight - Lake, River, and Ocean Kayaks - Intermediate - Size (Unfolded): 12'3" x 25", Weight: 26 Lbs, Black : Sports & Outdoors
Oru Kayak - Homemade folding Kayak (DIY) - YouTube
Boat Designs made from Coroplast and corrugated plastic sheets