Stopbullying.gov, January 3, 2013
"Bullying among young children is not uncommon. When young children–who often differ in physical size, skill level, and family experience–get together, patterns of hurtful behavior often emerge.
Children may be mean to each other by making mean faces, saying threatening things, grabbing objects, pushing others aside, or refusing to play with others. Some young children may engage in actual bullying behaviors by deliberately and repeatedly dominating a vulnerable child by name-calling, physical attacks, and excluding others from playing with them." Read More