Pandemonium is a roller coaster in Britannia at Six Flags St. Louis. While it's not the best, it is also recommended. The minimum height to ride is 42 inches.
This Gerstlauer Spinning Coaster (originally named Tony Hawk's Big Spin, then just Big Spin, and now called Pandemonium) opened in 2007 and was designed to have the look and feel of a giant red-and-black skate park. The ride reaches heights of 53 ft and speeds of 31 mph, making it a good coaster choice for the entire family.
Pandemonium used to feature an on-ride video system that captured your experience and was offered for sale after your ride. That video system was removed before the 2009 season.
Now open, or date announced:
Still waiting on these: