My son is Lego crazy so we took he 3 hour trip to Kansas City to visit the holy shrine of all things Lego. My son was in heaven. He visited the Star Wars room at least 3 times.
He got his picture taken with Batman and C-3PO and R2D2. We got to watch a little 4D movie and got a little wet. He go the opportuntity to ride a couple rides that were pretty good. Of course he loved the one where he got to shoot things.
If you do plan on going to any Legoland, I recommend getting your tickets in advance. The line to get in without tickets was long and we were able to zoom right in.
The facility was very clean and not crowded. They do a great job of making sure the people are not jammed in and stuff is not left all over the place. It was a great expierence and would do it all over again.