Fine motor skills as used in writing as well as vocabulary skills can be improved with play dough. Special educators and occupational therapists love play dough.
Here are my articles on how to use play dough with your nonverbal child.
Encouraging Nonverbal Kids to Talk Using Playdoh
Building Handwriting Muscles Using Playdoh
Do you need a great recipe to make it at home?
Put all the ingredients in a suacepan. Cook over medium-low heat until the dough is smooth. You will need to stir it as it cooks. Add optional ingredients below for variety!
Note: Not every idea is appropriate for every child. Activities represented here are ideas. Parents (not the author) are responsible for choosing an appropriate activity for a particular child and for the consequences of that activity.