In most cases  you will continue to receive benefits as long as you are disabled
What if a persons healthy improves?
THen your benefits may stop
Another question on  Social Security disability benefits, is it possible for a dependent grandchild to qualify?
A dependent grandchild may also qualify
My grandchild is still a full time student  age 18
benefits continue until the child graduates or until two months after the child becomes 19 years of age
What does it take for a grandchild to qualify?
the child must be unmarried
Do you have any publications I can read?
yes read  Benefits For Childrens and What You Need To Know When You Get Social Security Disability Benefits
Will benefits for children explain if they are disabled?