seesaw, teeter-totter = huśtawka (podparta deska)

See-saw

Source: http://shadowwar.wordpress.com/2009/06/03/see-saw/

huśtawka (podparta deska)

seesaw , also: teeter-totter AmE = huśtawka (podparta deska)

English sentence and Polish translation

She's on the seesaw. = Ona jest na huśtawce.