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
They can be.  You should try a sea kayak, it is for more open water like oceans, lakes and bays.