More difficult than dealing with learning something new is dealing with his own frustration for not getting it right the first or third time. And getting frustrated leads to more mistakes.

So when he (to him, finally) gets it right enough for Garth'zel to call the lesson to a close and send him to clean up, playing in the water is soothing and a good, anchoring reminder that he's probably not in trouble. At least he doesn't look half drowned when he reappears, even if he's surprised by the snack. More so that it's a snack - he's used to meals this size.

"Thank you."