Slapping w a rice paddle is quite unique!
Have you been slapped with it?
No?
I got the cane w 효자손 (back scratching stick). Also my dad was a teacher so i got with 단소 (common traditional instrument in school)
i heard there's no caning in school anymore

+
Korean back scratcher is called 효자손 /hyo ja son/ "good son's hand".

Hobi said he got caning with this to be a good son (a word play).

Yoongi mentioned about a ladle, too. As a fellow Korean, I'd say the tools they mentioned are usually for slap in hands or calves