Ferris wheel Lissajous figure alternate alternation back and fill back-and-forth battledore and shuttlecock carousel chute-the-chutes chutes come and go coming and going ebb and flow flounder fluctuate flux and reflux flying horses go through phases hitch and hike merry-go-round metronome oscillate oscillator pass and repass pendulate pendulum reciprocate reciprocation rhythmic play ride and tie ring the changes rocker rocking chair rocking stone roller coaster roundabout seesaw seesawing shift shuffle shuttle shuttlecock sine wave stagger sway swing teeter teeter-tottering teeterboard teetering teetery-bender to-and-fro totter tottering turn ups and downs vacillate vary vibrator waver wax and wane whip whirligig wibble-wabble wigwag wobble zigzag