If you decide to use egyption paste ( self glazing clay) be accurate in mixing up and firing. Pots can melt totally!! Realy neat but not what the student expected. It is really neat for small items > jewelry.
For kids clay - make sure that the clay body doesn't have talc especially from New York. Laguna's has low fire white and red bodies, I use to alternate the bodies because I'd get bored w/ the colors. White throws a bit smoother. Have fun.
I have one too - built by alfred tech many years ago - cheap-household current-great for tests and small stuff.
Just exploring a cheape way to go .........anyone in your region that fires ^6? fellow potters, com college, arts center?
then you can figure out where you're going w/o investment.