CAUTION: Never look directly at the
Sun! Never look at the Sun through binoculars or telescope unless you have the proper filters!
You can safely observe a TOTALLY eclipsed Sun with your eyes.
However, for observing the beginning and ending of an eclipse,
or for a partial eclipse, you will need a
pinhole camera,
an appropriate type of welder's glass,
or special Mylar glasses to observe the Sun safely.
CAUTION: Never look directly at the
Sun! 
The NASA eclipse website
The Exploratorium
