Kindergarten at age 4.5

[bright sparks]

I don't think you can put to much on their birthdate to be honest. My son's birthday is Dec 24th and he went full days and was fine. There were parents with children nearly a year older whose children had a really hard time of it. Each child is individual and a parent knows their child best. I think it was the best thing for my son to be socialized and educationally stimulated more than I could provide for him at home while caring for 5 babies. I think as parents it is more of an issue for us than it is for them to be honest. When the kids are playing together in class, I'm pretty sure they don't care when their birthday is and by the time they get to high school, they care even less. The size of the child doesn't necessarily indicate the child's age these days either so the bully's target could be anyone, plus the smallest and youngest kid could very well be the toughest and smartest so I wouldn't worry to much. As you said its worth a shot and have a good relationship with the kindergarten teacher, let them know your concerns and ask for regular feedback to keep a close eye on how things go.