How did the speech pattern go for your child? When did they catch up completely?

My son is 25 months old and has been talking up a storm lately. He points things out to us constantly and can tell us when he wants something pretty well such as to watch a DVD, read a book, eat, open something or close something, put shoes on him etc. He will also follow our directions most of the time. The only thing he isn't really good at are open ended questions. If I ask him how old he is he can only tell me with prompting. The same goes for most yes or no questions. He can tell me certain things but it seems like I need to present two options and he will pick one to say. He can't just answer the open ended question on his own. When did you start to see this skill develop in your toddler? My son does have some minor sensory stuff going on and some of it could be affecting his speech but the OT seems pretty unconcerned. I'd love to hear what's typical or get a sense of the range.

Thank you for sharing!