Depends on what you mean by "school" (NB the quotes in the parent comment). There is a huge variance in options for working parents of a 2-3 year old. From cramped cinder block day care -- aka The Cacophonous Petri Dish; to private nanny; to "forest schools" where kids spend as much time as possible outside digging in the dirt, climbing tree stumps, and learning how to devise and engage in large projects together (yes, a group of 2.5 year olds is capable of this).

I don't think the parent comment was talking about toddler MIT.

We have a full-time nanny, so this isn't really day-care for us. This is specifically for his socialization and "getting out of the house"

Do you have experience with any particular 'forest schools'?

I do. The one I'm familiar with has large garden areas, trees for climbing/wandering around, uncultivated wilderness areas, etc. It's not a vast tract of land, but enough that it seems huge to a small person. Indoor time focuses on exploration of provocations set up by teachers, telling stories, singing, role-playing, etc.

This is interesting. What is it called?

You misunderstood "school". It was 2 days a week from 9 to 1:30 in the afternoon.

Now it's 3 days a week from 9 to 1:30.

2 goes almost all the way to 3. There's a big difference between 2 and 3-epsilon.