I keep reading the height requirements, but I don't see anything about Twister, Earthquake or Kongfrontation. Do these rides not have a minimum height requirement?
I'm surprised at how few height requirements there are at US, I found Kim Wileys book (Universal with kids or something like that) helpful. You can also try the link below for more info if you like. The Wiley book is good because it also gives "scare factors" not just height considerations.