Read to the children and ask them to predict what happens in the story. When hearing new words in context, children remember their meaning easier. Stop your reading at one point and ask the children to continue. They will recall the words you used, imagine what might happen further on in the story and verbalize their version.
Encourage the children to explain items around them. With the help of questions guide the children through explaining everyday objects and phenomena. Ask them for example, what they had for breakfast that morning and then follow up with a food-related question.
Play a game of show and tell. Get the children to bring their favorite toy in and ask them to tell everybody something about that toy. Ask them questions like why they like that toy, does it have a name, how do they play with it and so on. This is a good way to improve children's verbal communication skills.
Play the guessing bag game. Put an object inside a bag or cover it up with a cloth and ask the children to guess what the hidden object is. Allow the children to ask questions about the object and give them clues using descriptive words whenever you can.