I wrote this custom book based off of the concept of "The Very Hungry Caterpillar." A circle eats various quantities of colored shapes. Young children love helping you count, as well as identify the colors and the shapes. Plus, the story format keeps them focused throughout the story.
You can print out this 12-page story in color or use an LCD projector to show the story to the students on the whiteboard.
Want a companion activity for additional follow-up? Check out my student book, where students draw the correct number and colors of shapes as written on each page. (http://www.teacherspayteachers.com/Product/Spanish-Shapes-Colors-Numbers-El-circulo-muy-hambriente-Student-Book)