A lot of these pottery places sound really fun and in fact your kids will have fun...but beware of the prices. It really isn't cheap for a time out with your kids.
I took myself and my 6 year old daughter. I painted a plate and her a small unicorn. The cost was $45. If my wife and other child were with us it definitely wouldn't be a cheap night out at all.
But fun, just not inexpensive by a long shot.