Potty training tips anyone? I forgot how....?

I do daycare and I have two 2 year olds (boy and girl) whom are potty training. I have completley forgotten how to pottytrain! I keep trying and trying and they wont go. I cant sit in the bathroom allll day (there are others to attend to). Bribery doesnt work with them because I dont think they understand. I am trying to make it fun...but again, nuthins happening! They do however like the idea of sitting there so thats a start. One of the kids...the boy, has an older brother and mom said I could use him BUT he stands....