module object has no attribute 'Screen'

I am teaching myself python from this site. On Chapter 3, when I typed the code in the given example, I got the following error--

Python 3.2 (r32:88445, Mar 25 2011, 19:28:28) 
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import turtle
Traceback (most recent call last):
  File "", line 1, in 
  File "turtle.py", line 2, in 
    wn = turtle.Screen()
AttributeError: 'module' object has no attribute 'Screen'
>>> 

Is this something that I need to download and install? I tried looking into docs.python.org, but my nose started to bleed reading all that tech stuff. Kindly point me in the right direction please? Thank you.