What can a speech therapist do at 21 months?

[Guest guest]

DS has one or two words, neither clearly pronounced. His older

brother has SID. He often looks like he's trying to produce a word,

concentrating hard, then nothing comes out, or just an unidentifiable

sound. We first saw a ST a couple of months ago and have just

started ST once a fortnight.

The ST plays with DS with toys, speaks words clearly to him,

encourages him to make noises (which he rarely does - maybe one noise

per session). She gets him blowing pieces of tissue and making 'puh'

sounds. That's it.

I don't know what I should be expecting at this age - is the ST

worthwhile with such a young kid? What would you expect the ST to be

doing with him?

Thank you,