You will want to model initial productions every time.  Showing your child the proper position and placement of articulators is critical for success. 

When modeling a sound for your child:

Check out the following video on modelling.

 

Modeling is slow and deliberate initially, but as your child becomes accurate you can start modeling quicker and less often.  Our goal is to drastically reduce or eliminate the amount of modeling of target sounds as early as possible. Modeling is like training wheels.  The quicker we can get past it the better.

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