My son has recently moved up to the 2-3 year old room at nursery and he’s finding the transition hard. His new key person had a chat with me today and said that he is a sweet boy but ‘very quiet’ and he’s much ‘chattier’ outside of nursery. I was surprised, as although he is quite shy, he talks non stop at home and can put together 4 or 5 word sentences now. Is this something I need to worry about yet?