Print out some pictures of things your child can sign or say and put them in a book.
I introduced this book to our twins one morning when we were playing on the floor. With each picture I encouraged them to name the item saying things such as, "What's this?" or "What do you see?"
Later this book was available to them in our basket of books in the playroom to explore independently or share with an adult.
Empty Photo Album (I bought a cheap brag book at Target)
Photos of Items/People your child can say or sign