I honestly have no idea. It sounds more like a creche than a class. At one, babies are saying their first words in the mother tongue. I suppose they might absorb some sounds from the teacher. At two,they might pick up some words. Try to teach the mothers some sounds and get them to croon them to the babies. Try the odd nursery rhyme or song. I'm afraid I can't think of much else at the moment. I can't really see much pedagogical benefit- it's purley a business move. Forget the babies and teach the mothers.