Peso = Sort it by weight
(Book)

"Weight is an important concept in the elementary math classroom as is learning how to sort and classify objects. This colorful book uses familiar objects to exhibit the differences between the adjectives 'heavy' and 'light' and how objects that match these descriptions can be sorted from one another. After reviewing the concepts, readers can demonstrate their understanding at the conclusion of the book and apply their knowledge to situations outside the classroom, too"--Provided by the publisher.