My Dad set aside money for each of his 3 grandchildren, to be given to them when they turn 21 - even tho he is 9 years old and still alive. My youngest will be 21 at the end of this month. His mental health issues have impacted him tremendously over his life and probably will continue to do so; altho he enjoys relative stability for extended periods of time. His regular source of income has been SSI for some time now. It is our wish that my son's benefits(including medicaid) be protected and there is a vehicle to do this; called a special needs trust fund(d4a). I am trustee; my son understands and is agreeable to the guidelines that govern this. I'd like to hear from others who have set up a special needs trust fund for their young adult.; what was your experience like?