Are kayaks easy to tip over?

Well, if you have seen "The Perfect Storm" then you know you can roll any
boat over. Kayaks have an much undeserved reputation for being tippy,
however. People look at a wide canoe and a narrow kayak and assume that
the canoe is much more stable. The difference is in the center of
gravity in both boats. A canoe has to be wider because the paddler is
up higher in the boat. We can make kayaks narrower (which increases
performance) because you are sitting very low in the boat. In a kayak
you also have the advantage of your paddle. Just like a tightrope
walker you have a pole held across your body that increases your
balance. So in practice, kayaks aren't any more tippy than canoes or
any other small boats.