V.M.
ok, like a poster board or even 8x10 cardstock base, write the days of the week down the left had side, and then use tape or if you want to get fancy velcro dots. and then velcro or tape on your pictures.
I would suggest writing the word ex Library under the picture of the book or what ever that helps expose them to print and he might start recognizing L says "l"
You could use PHotos of him at each event preschool, library, grocery store, karate, etc Or look for clip art. It would be super cute to xerox or scan picture from his fav book, I can't think of an example of a cute library book, but it probably isn't legal to do that anyway.
hope that helps.