This is a water sport that people do with a small boat called a kayak. Most kayaks can sit one person, but there are bigger two-person kayaks as well. To propel the kayak, people commonly use a paddle that has got two ends. And if two people ride on a kayak, they can paddle it in tandem. All kinds of people kayak, from casual kayakers to more hardcore ones.
Kayaks can be extremely fun because they are a very active water sport that enables people to explore the environment near them. If you learn how to kayak, you could explore rivers, sea caves, bays, and many other watery environments as well.