I would let him go as long as he likes it if it were me. Don't worry about him liking report cards. What do they say here, "don't let 'the perfect' be the enemy of the good. I think my kid could do find waiting until first grade to go to school, which, school here isn't mandatory until first grade. But I thi k he will really like going. It's something to do.

Youth lives by personality, age lives by calculation. -- Aristotle on a calendar