Toddler in delivery room????

Sara
Okay I'm a little conflicted when it comes to my birth plan. I have a 4 year old and I want baby #2 to be the most positive experience for him, not feeling like he's not important anymore. I've heard of some people letting their toddler be a part of delivery and keeping them informed about EVERYTHING that happens within pregnancy like doctor appts. What does everyone else think? Anyone have experience with one or the other??? I just want my 4 year old to be happy and included!!!