Our kids come out of school *starving* - it started in preschool, continued all the way through elementary, and they still do in middle school! It didn't seem to matter whether or not they had an afternoon snack either, they still hopped into the car and the first thing they wanted to know *always* is "did you bring a snack?" So I'd start there - give him a snack when you pick him up. If it's nice weather, take him out to run around on the playground *at school* before you ever get in the car to go home (unless of course he rides the bus home!).
Second thing, none of my kids enjoys telling me about their day at school - right after school. If I want to know about their day, it's usually best for me to ask them to tell me later - after they've been home awhile, had their snack, had time to unwind etc. Even then, only one of my kids really enjoys telling me about her day, and none of them really understand why on earth I want to know or care. Sooooo.... of course, you will want to know (if you're anything like me!)... but give it some time and when he's more into the routine of school explain that it's a mom-thing, moms like to know. For my ds I had to explain in detail and lead him through what I wanted to know and it took a few years before he really got the idea - I can just hear the peanut gallery here rumbling... you've got a DYS level IQ kid and he can't figure out how to tell you about his day lol! But really, he just didn't grasp the concept of what and why I needed to know, and to be honest there were a lot of early days in school where I think it stressed him out when I asked for the end-of-day report. If I try to look at it from his point of view, kids don't at the end of the day tend to ask us parents for a blow-by-blow description of what we did during the day, they just assume we get up, feed them, do whatever we do, maybe play with them, feed them, tell them to pick up their toys, feed them again, tell them to go to bed. They probably think we have the same knowledge of what goes on at school, so why are we asking, kwim?
I'd also just keep in the back of my head - what kind of behavior challenges has he had at home before he ever went to school? It sounds like there's been some small something. I *highly* doubt this is what's up, but fwiw, my 2e ds led a charmed life all the way through preschool - no one realized he had any kind of disability because he was so danged smart and the only way he needed to communicate up until that point in time was verbally or through actions. When he didn't do some things which most kids did the adults in his life just chalked it up to being a quirky smart kid. When he started school and had to actually use handwriting and answer questions on worksheets his world imploded (for him) - and the first sign of that for us was huge temper tantrums at home. SO... again, I doubt that's what's up with your ds. But if the behaviors don't settle down after a few weeks of getting used to kindergarten, I'd try to talk to the teacher or observe the class to get an idea of whether or not there is any stress for your ds at school outside the usual getting-used-to-long-day-of-kindergarten stress.
Best wishes,
polarbear
