2 Yo Wont Stay in Toddler Bed, Keeps Coming in My Room

Whatever you do, don't let him stay in your bed. You'll just be creating another problem that you'll be asking for advice on in a few months. It sounds like he's just not ready for a bed yet. Why rush it? I would put the crib back. My daughter is 2 and still in a crib. We don't allow toys in the crib, but she does have a doll and a book. Maybe let him have a book in the crib with him that he can look at in the morning when he wakes up, so he won't scream to be let out immediately. He can look at the book and wake up for a few minutes and give you a few minutes to go in and get him. Maybe try the bed again in 6 months or whenever he seems more ready. (The only reason I could see for not bringing the crib back is if it's not safe. If he can climb out of it, then you have to deal with the bed. I would just continue to bring him back in his room and say goodnight. I wouldn't close his bedroom door, but maybe put a gate up if you think you need something.)

Every kid is different. My son wasn't ready for the change until he was almost 4. We tried toddler bed at 2 and had your same issue, so we brought back the crib into his room (he actually missed his crib) Then, last summer, we got him a bunk bed and he stayed put on it from day one. He's so proud of his new bed that he tells everyone about it -even to strangers at the supermarket!
IMO, little kids need to LOVE the new bed. If they aren't excited about the bed they tend to focus their attention on the new gained freedom, instead.
So my advice would be to make his room really enticing for him. Find some cool sheets / make the mattress softer / get some cute lamp he can fiddle with....anything that will make him proud of his "territory".
You could maybe pretend that YOU envy him for that cool room he has and ask him if you can sleep there for just a few minutes every night? If he thinks his room is the coolest room in the house -the heart of the house- instead of a place you you send kids away at night, he might want to stay in.
We recently discover that our son actually felt "casted aside" at night, even in his very cool room. He kept delaying bed time by asking why he had to sleep alone, while M. and Dad slept together and kept each other company. His line was "Don't you want me to keep you company?" So I started sleeping now and then in the guest bedroom to show him that I actually LOVE sleeping alone! It has really helped the issue. We also joke about his snoring and taking the covers all for himself, and about how he punches and kicks and how impossible is to sleep with him. He cracks up when I describe -vividly- him tossing around in bed.

Your son is younger and cannot voice his real reasons so I
would recommend some experimenting until you hit jackpot.

Good luck!

My friend went through this. Turns out her son just wasn't quite ready for his toddler bed. They brought back the crib, and he did fine. A few months later they tried again, and he did great!

Something to consider!

I had this problem with my firstborn. I was about to go insane. The best advice I got was from my uncle who is a pediatrician and father of 4. He said to do bedtime as usual, but then become extremely boring. After you say goodnight, you do not give any more hugs or eye contact or get angry or anything. Pick a mantra--mind was "It's nighttime and nighttime is for sleeping." That was the only thing I said to my son after bedtime. He would try everything and I would just recite the mantra and lead him back to bed and leave. Eventually he learned that once he heard that line it was pointless to try to push my buttons! The beauty of the mantra is that you can use it in the middle of the night as well as in the evening at bedtime. You don't have to worry about him getting angry with you for ignoring him because you're still speaking to him, and you don't have to figure out a response to anything that he dishes out. I would avoid letting him sleep in your bed unless you like having him there because you'll be trading one problem for another.

Another thing I found useful for training my then-2-yr-old to stay in bed initially was to tell him before I left the room that would be back in 5 minutes (or even 2 minutes to start) to check on him. Then in 5 (or 2) minutes I would come back, give a little pat on the back, and say I'll be back in 5 minutes again. I'd keep doing that until he was sleepy enough to doze off. But if he ever got out of bed, I would immediately revert to the mantra!

Most importantly, remember that this is a phase--just a learning curve. Pick a method for dealing with it and stick to it so that he has a chance to learn. And it won't last forever. I know this is your 3rd kid (I have 3 the same ages) but each one has a new way to keep you on your toes, eh? Hang in there!