Growing up, I have always been around special needs people, including my aunt Mary Jane or MJ as we all call her, who has down syndrome. She is the nicest person and the funniest person you want to be around.
When she says "hi" to you, she just says "hey" and the name of who ever she is talking too. When you ask her how she is doing she'll say "Alright" and repeat your name.
But don't you dare mess with her and her routine, otherwise all hell will break loose. In the morning she'll get up and get her shower while she is in that, I make her a piece of toast with butter, after that I always make her a ham sandwich. My grandmother goes in and washes up her hair and helps her get dressed. If it's hot out she puts on shorts (by god she loves shorts), she hates wearing pants. In the winter when I have shorts on she says "Too cold for shorts" and I say "Yes MJ" because when she sees me wearing shorts she thinks that she can too, so I have to pretend that I'm cold. After all that is done she comes out into the kitchen, eats her breakfest, sits down and takes her medicine. Finally she waits for the van to honk taking her to Penn Mar where she works
There are also certain things you do not say in front of her because that will set her off. You do not say anything about the weather (even if it's just "hot" or "cold") other wise she will kinda go ballistic because she struggles with the concept and if you have a down syndrome person or just a special needs child then he and or she may trigger at different things.
She knows where everything is in the house she lives in. Right now she is blind in one eye and can get around the house with ease because her house is her comfort zone. But if you move one thing and if it is out of county wompus (all screwed up) then she may trip over it because it's not where it needs to be.
So because somebody is special needs they may not do things like we do, they do things their own way.