This document discusses different types of materials including plastic, paper, metal, glass, clay, rubber and wood. It describes various properties such as being smooth, rough, soft, hard, rigid, flexible, transparent, opaque, waterproof and absorbent. It also explains how heating and cooling can change objects in reversible or irreversible ways and how forces can be used to change shapes through bending, stretching and squeezing or cause movement using magnets which exert an attractive or repulsive force through magnetism.