Europe's largest Spring festival takes place in Stuttgart every spring. A large number of rides including a 47 meter tall ferris wheel offer a lot of fun for the visitors. Get your lederhosen or dirndl on and go if you have the chance. You can wander about, eating and drinking your way through it or you can get a ticket inside one of the large tents. The ticket includes a 1L beer and half a chicken. I do not recommend the tent in the evening. It tends to get a little icky inside.