“…Solitary constructive play is broadly defined as the movement of objects with the purpose of creating something and exploratory play, more specifically including activities such as artwork and puzzle and block construction (Katz & Buchholz, 1999;Rubin, 1982). Solitary non-constructive play is described as repetitive muscle movements with or without an object (such as banging a block against a wall; Coplan, Rubin, Fox, Calkins, & Stewart, 1994;Lloyd & Howe, 2003).…”