My son interview when he is 18 months. I think they want to both the BB and parent. If the BB is too small, they are difficult to observe. They ask me some question about the understanding of the nursery, also some habbit about my son
Hope you success!
The nursery teacher would give bb some toys & see the bb how to play. (e.g. sliders, balancing, different shapes marking, playing ball, listening, playing toys piano, shaking things, etc..)