Possible Clues:

• O, O, one should be inside there!
• - - and crosses
• Round figures?
• They should come between the Poles for 0 and 0
• One should get inside them to make them get round
• Ducks on board!
• Oo! Should be between the poles
• Ciphers and crosses follow child's game
• Not hugs that should come from North to South
• Nothing should separate them from one pole to the other