Information books written for autistic children

there are tons of materials including videos online. here is one is have used before https://www.bbc.co.uk/cbeebies/joinin/pablo-talking-to-your-child-about-autism 

it can be a scary prospect for someone that young. you don't want to scare them, avoid placing too much emphasis on the negative. No person is perfect even the neurotypicals who write societies social rule and norms. Nobody defines themself by their weakness or what they cannot do.