First, the correct name is Down syndrome. Capital "D" lowercase "s" and no apostrophe. There is NO such thing as a person with "Downs" -- it's a very common mistake.
Second, words can and do create barriers. Never describe Nathan as a "Down syndrome child" - he is a "child with Down syndrome." It could be equated to describing a person this way - that's my cancerous grandmother - you wouldn't say that would you? No, of course not!! You'd use proper English and say my grandmother has cancer. Why? Because it's not WHO she is - just a part of her.
Lastly, look at Nathan as a person, an individual. Each person with or without a disability as his/her own strengths, capabilities, and talents. Don't assume because Nathan has Down syndrome that he will be just like other children with Down syndrome because that simply is not the case! Nathan is Nathan - he's like any other child - unique in his own right.
What a learning process this has been!!!! I hope you learn a lot too!
The Terry Family