2 Seater Seesaw

an alternating up-and-down or backward-and-forward motion or movement also : a contest or struggle in which now one side now the other has the lead. 2a : a pastime in which two children or groups of children ride on opposite ends of a plank balanced in the middle so that one end goes up as the other goes down.A seesaw is a garden toy that consists of two seats that move up and down, whilst a teeter-totter consists of two or more seats that move in a side-to-side direction as well as up and down