explaining ASD to NT sibling

[Timepasses]

DS1 is 6 and has ASD. he is non verbal but trying to talk. He has made huge progress at school this year and his understanding has come on in leaps and bounds. We are very proud .

DS2 is nearly 3 and has recently noticed that ds1 doesn't speak to him.

How can I explain ASD in an age appropriate way?

Thanks

Thanks zzzzz. That sounds like a good way to start.

It might be age appropriate, yet, but there is a book called 'My Brother is an Astronaut'. Free on Kindle if you have one - www.amazon.co.uk/My-Brother-Astronaut-Michelle-Rundle-ebook/dp/B00QF6BKVG

Sorry, "might not be"

Thank you. I'll take a look.