How can I start a kindergarten?
Just get some children.
I think I am in kindergarten all the time. Even adults who come here, they become kids.
There is a beautiful story in the Puranas.
There is a particular garden up above Tibet called Kumara-vanam and the Lord lives in that garden. Anyone who goes into that garden becomes a child.
There is a similar story in another text. There is a garden and men cannot enter into that place. Anyone who enters into the garden becomes a woman. Males do not have entry into this place. That is where the Lord lives.
All these stories are to give you a message that you have to get down from your head to your heart. Children are innocent and they are in their heart. They are not judgmental.
Similarly women are more emotional and stuck in the heart rather than the head.
But I would say you need to have a balance of both, head and heart.