Regular pottery or clay class in Vashi for two young children, not a one-off workshop

Several places near us are advertising short clay workshops: three days, a take-home pot, photographs for the parents. Our children enjoyed one last year, and the older one has asked for clay ever since. I am looking for something weekly that continues into the school term, ideally on Saturday mornings, for a 6 year old and a younger sibling who is still in preschool. If you have tried a class in Vashi or nearby, I would like to know what an ordinary session involved: how much time the children spent with their hands in clay, how many children per teacher, and whether the younger ones were given real work or kept busy with colouring while the older ones threw pots.