My niece is almost 3, and when she was very young my DH taught her to say "aaahhhhh" after taking a sip of her milk/juice/water (like, the sound of refreshment).
Flash forward to about 6 months ago, he decides to start early with DS. Except DS gets confused and to this day, when he wants a sip of water/milk/juice/whatever one of us is drinking, he leans forward, looks at the glass with intent, and says "ahhhhh". And then grins expectantly.
It is his most adorable trait to this day.
Re: S/O Sounds that Toddlers Make...
So cute!!!!!
P says "ahhh" when someone else drinks something. My mom taught him that when she was drinking her coffee. Pretty cute, our little men!