Sometimes, a week is all a fella needs.
"You could tell, even then, what he could become,'' recalls Juuso Valimaki, of countryman Mikko Rantanen.
"I mean, he obviously had all the physical tools. And for the week I was with him at camp, he worked really, really hard.
"We kinda missed each other. I got cut from the 2016 (World Junior) team and by 2017 he was too old. But, like I said, we were together for that week at camp.
"With some guys at an early age, you can just tell. And he was one of those guys.
"He's earned all the success he's had.
"When you get to that stage, the guys who work the hardest are usually the ones who enjoy success."