This one is a favorite of mine!
Eric Carle is an author/illustrator to be treasured, and my students seem to appreciate his words and illustrations as well. La Oruga Muy Hambriente is A Very Hungry Catepillary, in Spanish!
When we read this book, we focus on the days of the week words, as well as numbers 1-5. My younger students (preK-1) color a picture of the caterpillar, and my older students (2nd-4th) play a more advanced number game with numbers 1-100 (taught in previous lesson.)
This is a great lesson to use with a Spring-themed unit.