Instructions for Show & Tell exercise for Direct Objects.
Bring a few interesting objects to class that you can share and pass around to the class.  You must have four or more people to make this work.  Sit in pairs facing the other pair (or group of three). Once you have learned how to do this with 4 people, you can use imaginary people to practice with a tutor—designate empty chairs as imaginary people with names. Do not use the pronouns él / ella.  Instead, use the names of the people.  Start out by including the fully stated direct object (the thing you are passing), and then replace it with a pronoun.

Pay very close attention to who is giving, who is speaking and to whom the statement is addressed.  USE YOUR EYES AND POINT A LOT to clarify the person(s) you are addressing, and the person(s) who are subject and object.  Look at somebody in a very deliberate way.  Don't look at your book or the ceiling.  The eyes and hands are extremely important to make this work.

Use the following verbs:
MOSTRARLE  or  ENSEÑARLE --  to show someone
DARLE  to give someone
DEVOLVERLE   to return to someone
QUITARLE  to take away from somone
ROBARLE  to rob someone
REGALARLE  to give as a gift

Model:
I show y'all my book—Les muestro mi libro.
the others say: You show us your book—Nos muestras tu libro.
then, the others turn away from the person showing it, and say  He shows us the book—Él nos muestra el libro.

Next, hand the object to one person and say: I give it to you.  The receiver says: You give it to me.  Once you have a grasp of how the pronouns work, switch to past tense (preterite).  Pass it back and forth until you have this structure burned into your brain.  Te lo di.  Me lo diste.  Jorge me lo dio.  Etc.  This verb in particular is very useful.

Now, pretend that there are two people who have the object.  Two others will receive it, and the remaining people in the group will be observers. 

We gave the book to y'all.   Y'all gave the book to us.  the observers say: They gave the book to them.   Then the receivers say to the observers: They gave the book to us.  The givers say to the observers:  We gave the book to them.

Experiment with various combinations of givers, receivers, observers.  Change the person to whom you are addressing the statement to describe the same action.

Te doy el libro.   Tú me das el libro.   Yo le doy el libro.   El le da el libro. etc. 
Les damos el libro a Uds.   Uds. nos dan el libro.   Patricio y Edén les dan el libro a Joelle y a Mateo.  Nosotros les damos el libro a Joelle y a Mateo.  Patricio y Edén nos dan el libro. 

Lastly, when you have the physical version of the exercise pretty well mastered, switch to the verb DECIRLE and instead of giving things to the people, TELL them secrets or lies or other info.    E.g.  Laura tells Oscar “Karl Rove” sabe bailar.  Laura me dijo que Karl Rove sabe bailar.  Laura se lo dijo a Oscar.