Related Clues:

• Go back and forth
• Experience highs and lows
• School board?
• It takes two to do this
• Playground plank
• Playground piece
• Playground piece for two
• Fulcrum locale
• Playground apparatus for two
• Playground plaything
• Playground staple
• Two-person ride
• Be inconsistent
• Keep changing
• Go one way, then the other