The smaller the circle when younger, the better it us for the kid, and easier for the mom!

A small group is better as kids are able to interact and bind more :)

In a group or individual both are fine. Children learn differently

I think maximum 4-5. 1-1 would be best still I feel

As many, but proper number of adults to supervise

Can be bigger if other parents are there to help

We should be able to control the room in a way

Two kids playing is already a lot of fun

doesn't matter, depends on occasion.

Just another child can also be fun