I'm looking for the first Kendama to be played by both a 9y boy and adult.
I found one product from "Krazy Kendamas" on Amazon with good reviews.
* Is it recommended model?
* Something else better?
* Can one Kendama can fit both a kid and adult?
I don't know about that brand.
As for sharing, if the 9-year old isn't too short, there's no reason not to share it. (A shorter string can be useful for shorter people.)
Thanks for your reply.
can you recommend on a specific one?
I recommend Royal Kendama. (But I'm biased.) BKA has a list of approved kendama: http://www.kendama.co.uk/approved.html (http://www.kendama.co.uk/approved.html)
Or read some reviews here.
All the best!