In cartoon format, uses zombies to explain the science of forces and motion.

Mark Weakland wears many hats. As an author, he's written books for teachers, including Super Core!: Turbocharging Your Basal Reading Program with More Reading, Writing, and Word Work, published by the International Reading Association. His book topics for children include sports, bacteria, comets, and poetry. Mark's also a reading specialist. He teaches kindergarten children, third graders, parents, and teachers. As a musician and songwriter, Mark sings, plays percussion, and strums the guitar. Many of his songs, including I Sure Love Pancakes and The Dooflicky Machine, have won national awards and contests. Mark lives in Western Pennsylvania. Gervasio began studies in 1993 under teacher Horacio Lalia, a well-known comic artist in Argentina and Italy. After studying four years with him, Gervasio founded an independent label called La Productora (along with many colleagues and friends). They put out 16 books, and their material was published in Spain, USA, France, and Brazil.