[Observation] Gives his aide a picture of a book using Picture Exchange (PECS). [Intentional] yes [Function of Message] Wants activity-reading. [Means] 
communication book
s p e e c h + g e s t u r e
b e h a v i o r a l
e c h o l a l i a
c o m m u n i c a t i o n b o o k
s p e e c h r o u t i n e