Pop-up book creator Matthew Reinhart explains the engineering behind those amazing pops. — Vocabulary: engineering, pop-up book, hinge, v-fold, layer, chain reaction, energy NGSS: SEP1- Asking Questions and Defining Problems, SEP5: Using Mathematics and Computational Thinking Common Core State Standards:CCSS.ELA-LITERACY.RI.6.1, CCSS.ELA-LITERACY.RI.7.1, CCSS.ELA-LITERACY.RI.8.1, CCSS.ELA-LITERACY.RI.9–10.1, CCSS.ELA-LITERACY.RI.11–12.1