This is where I spent the last two days. Lots of fun and perfect weather. Legoland Germany (and I assume any other Legoland) is gigantic and there are so many rides and things to see and do that one day is not enough.
A word of advice:
If you ever go to a Legoland do buy the Express Pass! Believe me, I am not a spendthrift, but not getting that Pass is wrong economy. At Legoland Germany the Express Pass reserves spots to go an various (not all) rides without you having to wait in line. With waiting times of about an hour it saves you LOTS of time and whining. Reserve your spots for a ride with the device and show up at the given time. No standing in line at all. When you get there you just skip the queue and go to the front end of the line.
Even if it means that you won’t be able to afford a meal, do get that pass! Bring your sandwiches, if you have to. It will make your Legoland experience so much more enjoyable.
PS.: I am no Legoland affiliate. I just learned the hard way and want to spare you the same experience, :).