So the little boy you saw just now waltzes by himself in the empty kitchen, and we distribute the others over the house as well as we can."
"That is only for their steps, of course?" said I.
"Only for their steps," said Caddy. "In that way they practise, so many hours at a time, whatever steps they happen to be upon. 
So the little boy you saw just now waltzes by himself in the kitchen, and we distribute the others over the house to practise their steps. 