This morning, Youngest Son (who is developmentally typical) wanted to watch TV. I told him that before I turned on the TV, he needed to put his toys away.
To my surprise, rather than arguing or dragging his feet, he said "Thanks for reminding me Daddy!" and scurried to put everything away.
Later in the day, he came running out of his room and said "Daddy, come look and see how tidy my room is!" It was picked up, nothing on the floor. I was slightly amazed. He told me later that he had put some things under the bed.