Has anyone used a portable burner, plain electric or induction, that they can recommend? I am considering purchasing one for children's cooking classes. I want them to be able to see into the pan and with a portable burner, I will be able to bring it down to their level. I have never used one of these before. I read a great deal about induction burners as well. They are quite expensive and require special pans, but are they worth it? Would a regular electric burner be better? Any advice you can provide is appreciated.