Stuttering - Breathe from your diaphragm. Wait for your child to finish what he/she is saying. Do not interupt them while they are speaking.

Tongue thrust - Use your straws. 

Practice Blowing bubbles with bubble gum.

Try different tastes and textures, like salty, sour, crunchy, smooth etc.

To improve and maintane language skills provide appropriate speaking models. 

Model good, attentive listening skills.

Talk about evrything and label objects and events in the environment. 

Use descriptive words to enrich vocabulary. 

Model appropriate turn taking during conversations. 

Provide opportunities for language enrichment.