It is believed that Korean girls in the 17th century who were not allowed beyond the confines of their courtyard walls invented the seesaw to catapult themselves in the air high enough to glimpse the outside world.

Why are seesaws called seesaws?

Name origin and variations

Seesaw, or its variant see-saw, is a direct Anglicisation of the French ci-ça, meaning literally, this-that, seemingly attributable to the back-and-forth motion for which a seesaw is known. The term may also be attributable to the repetitive motion of a saw. ... Thus "scie-saw" became "see-saw".

Who invented teeter-totter?

For over 35 years, Teeter has been widely recognized as the leader, innovator and quality pioneer within the inversion equipment market. Roger Teeter is a graduate engineer of the University of Wisconsin.