Sticks and stones; sticks and pricks. (The latter isn't as common.)
Stones
stones
Sing and dance.
Toss and turn.
Nuts and bolts.
"Looks out of place" or "stands out like a sore thumb."
Soap and water; soap and bubbles.
Half a yard is 18 inches - however many sticks are involved.
3 sticks
2 'sticks' of butter is half a pound.
I'm Scottish but I've never heard of this phrase. It may be from a Scottish town/city other than where I come from i.e. Glasgow.