Silverman 
¡Dale un tirón! ¡Dale un empujón! [PDF ebook] 
Pull It, Push It!

Force And Motion Are Introduced In This Easy To Understand Book. Gives Examples That Students Can Relate To In Their Everyday Lives. As With Every Title In This Series There Is A ‘Show What You Know’ Section In The Back Of The Book Which Reinforces The Text And Allows Students To Answer Three Questions Relating To The Book. Brightly Colored Photographs Enhance The Text.