DS4 is 21 months now. He started crawling at beginning of Jan and is pretty active around the house now, crawling from room to room and pulling himself up onto his knees by the sofa and low table.
He sleeps a solid 12 hours every night (lucky me) waking at 7.30ish, he then naps from 9.30 - 12.00 and is often sleepy again in the afternoon, if I let him he will sleep for a further hour and a half (I have to wake him or he'd sleep more) in the afternoon and still be ready for bed by 7.30.
I guess the extra effort he needs to put into moving around makes him tired - is it normal for him to be so sleepy - if your child has/had similar SN were they often sleepy?