It's a blast! Snowman's link shows a FocusII which is considered an entry-level full size turnaround pattern airplane. A full size airplane is referred to as a "two meter" plane because it just barely fits into a two meter box, which is the size limit. That being said, you don't need an expensive full size dedicated pattern plane to give it a try.

Print out the Sportsman pattern sequence next time you go out to the field. (http://nsrca.org/scheduleA.htm).

Next time you go out to the field take your most aerobatic plane and the pattern sequence. Give it a try! If it seems easy just give this a thought: If your first maneuver is off a little bit, then ALL following maneuvers will be off unless you find a way to correct the mistake in a discreet manner. Mistakes compound fast!

OR you can try classic non-turnaround pattern. (http://www.seniorpattern.com/rules.asp) (http://www.ballisticpattern.com/)

The non-turnaround planes are 60 size (because of the old 10cc engine limit) and are often a little cheaper.

Here's an example of a beginner classic pattern schedule:

Takeoff (U)
Straight Flight Out (U)
Procedure Turn
Straight Flight Back (D)
Stall Turn (U)
Immelmann Turn (U)
3 Inside Loops (U)
One Horizontal Roll (D)
Landing (U)

NOTE: U means upwind and D means downwind.
ALSO NOTE: That means when the wind changes direction the entire pattern is directionally reversed. This is one of the things that makes the sport interesting. Sometimes you will go to a contest and fly your first round one way and the next the opposite way! [X(]