ds (nearly 6) often struggles to express himself. He's always saying 'umm' and seems to get stuck finding the word.
dh doesn't think it's a problem - says ds' brain has so many things it's thinking of that he loses track of what he's saying.
He is a bright child with an excellent vocabulary. He seems reasonably confident and I'm always very careful not to show impatience or chivvy him along. Should I be worried?