Play this version of show and tell. Have your preschooler find five objects. Place them in a box, and have her pull them out, one by one. As she holds an object, ask her to describe it to you. Ask her about the shape, color, sound it makes, how it feels, and other descriptions. Then you find five objects and describe them to her. Have her ask you questions about the items and make this activity a time to learn and use descriptive words.
As your child understands that some words sound alike, expand on their rhyming abilities. Explain that you will say a word, like "sky", and then it is his turn to say a rhyming word, like "bye". Continue going back and forth until you both run out of rhyming words.
Make up silly stories with your preschooler. There are several ways to do this. You can make up the basis of the story and have your child insert action words as required. The two of you can take turns making up sentences. Your child can tell the story and ask you to describe what each character looks like, or you could tell the story and encourage your child to count how many words rhyme.
To help your child learn and understand some of the patterns and rhythms found in language, sing common preschool songs, like "Head, Shoulders, Knees and Toes, "The Itsy Bitsy Spider", "Mary had a Little Lamb", and "Peter, Peter, Pumpkin Eater". You can also repeat simple nursery rhymes, like "Jack and Jill", "Mary Mary Quite Contrary", Little Jack Horner" and "Hey Diddle Diddle".