As the others gave hell to Iceland, still going after an hour, Norway was just finishing up his potion. He knew potions were outdated and harder to put onto people but it was his turn to make dinner so he could easily pour it into Iceland's drink or on his food, drink would be preferable though. When he heard the shouting subside, he went down stairs to start on dinner.
When dinner was done, he layed it out on the table in the order of who usually sat where. When everyone sat down, he went and got the drinks, not forgetting to put the potion in Iceland's. He went back out to the dinning hall and gave everyone their drink. Everyone was shooting glares to Iceland who looked pretty down. He almost felt sorry for what he was about to do but he didn't. It was a win win situation, Iceland learns a lesson and they all get to see baby Iceland again, who would witness the horrors of being a baby with a correct age mind.
Norway couldn't help but smile when he saw Iceland drink all the drink and request another cup. His plan was working and working so well.
When Norway was packing all the plates up at the end of the meal, he heard Iceland announce he was going to bed early. That confused the Nordics to no end, including Iceland but Norway knew this to be a side effect of the potion. He smiled. Tomorrow he was going to look forward to a childish shriek and the heavy stomp of a frantic Finland, Denmark and Sweden. This was going to be fun.