You've heard this old saying before: give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime. You may even be nodding your head in agreement right now. Sorry— this saying is all wrong.
Since most readers are over the age of seven, here's a quick reminder of how a seesaw works. You sit on one end, and another person sits at the other. You use your feet to push your side up in the air, which makes the other person's side go down. Then the other person does the same, and your side goes down. You keep taking turns until one of you gets bored, falls off, or has to go home and take a nap.