What kind of room that i must choose for family with 2 kids 9 years and 8 years old
The family room will be good enough to accommodate your family.
We stayed in a standard double room but you would need a family room with additional 2 single beds. I'd recommend that you paid a bit extra to use the executive lounge.
A family room with separate beds for the children
Get an answer from Furama City Centre staff and past guests.