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