If you want to see how effectively and fast it can be taught in the group/ class see the workshop I conducted in Reading in front of all unfamiliar small students. They picked up a lot in a short time. It is hard to introduce our scripts to an individual child at home abroad. We used music and fun. Children were enjoying for an hour nonstop. At the end I had to stop due to time limit and continue with the parents.
Kala- Shashtra- Vinoden Kalo Ganchhati Dhimatam !
And then with parents………