They estimate 30 mins but I was there for an hour chatting because it was going well. Went on a tour of the clinic afterwards and said hello to a couple people. They pay $8/hr during training (which can take you like a month or two) and once certified you get $15/hr.

First step is regular interview then you are put with a kid for a few minutes. Not too bad. Questions were mostly related to reasons behind why I wanted the job. The kids were fun. The staff was nice.