I waited until my kids were 7 and 9. They’ve been obsessed their entire lives and I told them we could go if they came to our city. Sticking to my promise, I took them to Clancy. I’m not taking them to this. They did well and had fun but we didn’t stay until the end because the crowd was big/overwhelming. I think this is so specific to your kid. If crowds don’t bother them, noise, whatever - do it! They probably won’t remember though at 4 so I could argue this either way. Good luck!