Finding things the person can do is very important. Supplies are needed as they need things which they can match and sort and place in a row. The person needs someone to guide them to these activities which they can do. Having plenty of supplies which can be rotated so they can explore something "different" helps keep the person happily occupied.
Staff members need to know how to line objects like the person's clothing in the correct row so they can put them on in the correct order. Staff need to use the concept of a line and placing things in a row to help the person organise what they are doing.