I've seen kayakers on a river nearby but never tried.  Do you know anything about kayaking?
I know a little.  It is sort of like canoeing, but the sitting position is different and the paddle is also different.
can more than one person be in one kayak?
It depends.  Some kayaks have more than one cockpit.  Each cockpit fits on paddler.
oh, like a tandem bike kind of.  When were kayaks first created?
Actually, quite a long time ago.  The Inuit people created them thousands of years ago!
Oh wow!  Kayaks sound like fun but also pretty hard work
Sea kayak
A sea kayak or touring kayak is a kayak developed for the sport of paddling on open waters of lakes, bays, and the ocean. Sea kayaks are seaworthy small boats with a covered deck and the ability to incorporate a spray deck. They trade off the maneuverability of whitewater kayaks for higher cruising speed, cargo capacity, ease of straight-line paddling, and comfort for long journeys.
Sea kayaks are used around the world for marine (sea) journeys from a few hours to many weeks,
Kayaking
Kayaking is the use of a kayak for moving across water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a low-to-the-water, canoe-like boat in which the paddler sits facing forward, legs in front, using a double-bladed paddle to pull front-to-back on one side and then the other in rotation. Most kayaks have closed decks, although sit-on-top and inflatable