Janey Levy 
Los cochinitos salen de día de campo (The Piggles Picnic) [PDF ebook] 

It“s the day of the great picnic. Pat Piggle showed up, but who else did? What did they eat? What fun did they have? Readers find out in this fun fairy tale. Books of the Neighborhood Readers Program build early literacy skills, introduce important content-area language, and help develop speaking and writing skills. They can be integrated into any existing language arts or core reading programs.