Enthusiasm and interest, a sense of humor and a smile.
Those things will help in any situation, right?
A basic pottery tool set* which may be purchased for less than
$20 at the bookstore on campus, or check the
Links page for local suppliers.
An OLD bath towel. It will get very dirty but will protect
your clothes in doing so.
A couple large margarine or yogurt containers to use for your
water and your tools.
A large sponge, for cleaning up.
A padlock for your locker.