I love love love the Fun Decks they sell on this site (although it isn't obvious really on t'Internet just how good they are.There is a UK distributor who have a good catalogue but i forget who. The American company should let you know who they are.)
For 'Why?' i'd set a goal of asking 20 questions a day. Set up scenarios and seize on everyday events.
'Why is the baby crying?'
'Why are you wet?'
'Why is there no school today?' (calendar great for this)
'Why is Daddy sleeping?'
'Why is there milk on the floor?'
That 140 opps. a week. Log responses-should become more spontaneous with hard work and sustained input which is logged and analysed.
For 'How?', someone on here had superb idea of pretending to be a robot and getting her kid to tell her how to do everyday things, while she put on mad voice and moved about jerkily.
'How-do-I-eat-cereal?'
'How-do-I-find-the -fruit-and-vegetables-in-Tesco?'
'How-do-I-clean-teeth?'
I am in middle of very exciting project using home/school diary in an interactive way to relelntlessly target stuff like this (also sequencing).Idea is that parnet sets questions on diary for teaching staff to ask the child (parent also pencils in answer so if necessary, an intelligent prompt can be given) School does the same.
Over time it is easy to see where a child having big problems and to target it relentlessly. This is also used in conjunction with daily written (or picture) timetable so child can look at it when needing help with sequencing questions like
'What did you do before break?'
'What was the last thing you did at school?'
Also empty clock faces by relevant part od timetable that child fills in, thus relentleslly targetting time telling and making it real.
This in effect becomes the therapy. In addition, the child quickly learns to attend all the time as they know they will be asked about past events twice a day.Parents also get to know just what goes on in school and are an active part in the educational/therapeutic process.
It becomes more and more fluent and seamless.With my own child, she is answering up to 30 complex questions a day about what happened 9and why and how and when etc) at school and about 20 from home.
Differnece in lang. comp and expression amazing.
Involved in formalising this as a research project.