Talk about where the hands point. Point out that we say o'clock when the minute hand points to 12. Practice counting backwards from 20 to 0. Look for different shapes in the grocery store. Cereal boxes are rectangular prisms.
Soup cans are cylinders.
Oranges are spheres. As you cut an orange into equal sections, count each piece and use fraction names to describe them. Do an action pattern with your child using this example or one you make up. Read a story with your child. Count how many pages there are.