Another question: we have recently got a couple of older kids in our class as well: 9-12 year olds. How large an age range do you usually have in kids classes? How would you conduct a class with both 5-6 year olds and 9-12 year olds without the older ones getting frustrated or the younger ones overwhelmed? We are thinking of having a separate older kids class but there aren't that many of them yet...Any tips are welcome!