My grandson is Downs, he is 11 yrs, very very smart. He thinks he can do anything. Recently I let him drive the golf cart, with me sitting alongside to help if needed. He did very well. Then he told me "Now I can get my license". lol. I told my daughter, she said they did not know what they will do when he turned 16 as he would know he was old enough.
When he was about 5 yrs old, he was sitting with his father and brother at the table as they were cleaning their guns after a hunt. He had his play gun, cleaning it. Then he told his dad he wanted to go hunting too, dad said "When you get to be a big boy", he said "I am a big boy now", lol. They do have special hunts for these children in our state, he will participate
I can tell you and everyone that God truly blessed our lives with this Downs child, he is a delight and teachers say he is above the norm. We never treated him "Special", he is treated normally as any other child, expected to learn, behave, etc.
God bless you and your grandson. Link below is to a national website with stories about Downs folks. Some are licensed to drive and some manage their own businesses, attend college, and lead near normal lives.
http://www.ndsccenter.org/selfadvo/council.php