Sure, not everyone has or can kayak on a regular basis, but for those who find themselves in the position to do so, Oru Kayak should be on your short list. It's basically a 12-foot-long kayak that can be folded up into a compact 33 x 29-inch carrying case when not in use for easy transport. No tools are necessary to build the kayak, just unfold it, and you're ready to hit the water. Continue reading for a video and the product page.
According to the manufacturer, "there's plenty of room to stash gear (or a picnic) for day trips and short camping excursions. Best of all, transforming it from box to boat takes just a few minutes." Product page.