Fran Manushkin 
Pedro’s Tricky Tower [EPUB ebook] 

Pedro’s class is building a tower out of paper cups. They want to see who can build the tallest tower. Pedro loves to build, but he’s got a big problem. Troublemaker Roddy is on his team. Can Pedro and Roddy learn to work together? A glossary and comprehension questions make this a great title for libraries, while a collection of jokes adds to the fun.