Subject: Methods of Cooling and Heating

For my Visual Communication: Graphic Design Course, Final Major 
Project i am trying to create a system where in one container water is 
being frozen and in another it is being boiled (or atleast heated to a 
sufficient tempreture where evapouration is visable)

My main problem is trying to freeze the water, as the only methods i have 
currently come up with involve a frezzer which is obviously very bulky and 
is not attractive to look at.  Can you think any less obtrusive ways to lower 
the tempreture or perhaps any other liquids which have a higher freezing 
point than water.

Any suggestions on heating/boiling will also be appreciated

Thank you

Re: Methods of Cooling and Heating