Hi S.,
I feel your pain girl! I have an 8 yr old son who is the same way. He is very creative and gets very frustrated when things don't go his way. I struggled for years in your same situation, I didn't want to "punish" him b/c it seemed to me that he hadn't done anything wrong.
Here's what I've found...when he starts school one of the things they will focus on in Kindergarten is "social skills". Learning how to act appropriately in many different situations. So, you have to ask yourself...is my son acting appropriately when things don't go his way??? If he is having a "meltdown" (that's what I call it too) then he IS NOT acting appropriately and that behavior does need to be addressed. Though you can tolerate it at home b/c he is only one child, your son's teacher WILL NOT tolerate it at all. Partly b/c that kind of behavior can cause a chain reaction in kids that age and the last thing the teacher needs is 30 kids having a meltdown!! Remember....I've struggled with this with my own son through 3 grades now. I just want you to have an idea of what to expect. It's a hard thing to do but you have to think of HIS success and how to get him there. Dramatic children take a little more work...and a more discipline. You are correct in that he needs to learn to curb this behavior but he's going to need a little help from you, in the way of discipline, to do it. He needs to know that his behavior is NOT ACCEPTABLE! (Imagine them in the workplace...if we don't teach them how to control it now, how will they keep jobs later on??)
In our house we punish the dramatic behavior. We let him know that it's okay to cry but not to scream or moan or throw things or stomp his feet...whatever his "meltdown" may consist of. We set limits on what is acceptable and what is not. When he insists on reacting in ways that are innappropriate we punish that behavior. By no means do we make him feel like he cannot be frustrated or dissapointed. I always validate his feelings "Honey, I know that you are frustrated and that things aren't going your way but screaming is not going to make it better...can we figure out a better way to solve this problem?" Yes, that is the nice version...and sometimes it doesn't always come across that "politically correct". But, that should be the spirit behind your approach. If he throws more of tantrum when you try to help him then that is being defiant and definitely needs punishing.
I know it's tough! But, like I said, this is a personality trait that they most likely won't be able to get into check on their own...I was a dramatic child myself. We have to teach them ways to manage it for their future success. There is nothing mpre heartbreaking than watching 2nd graders call your kid a cry baby b/c of his meltdowns in class.
I do hope this helps. If you need to someone to swap ideas with or just chat about the day to day struggles with a dramatic child (maybe we should write a book!) please feel free to get in touch. Sometimes it helps just knowing you are not alone!! Blessings!