This is a short little video to help kids understand the three defining attributes: sides, corners, and closed. These are the three attributes a shape must have to be considered a shape. Here are a couple of links: Shape Attribute Posters www.teacherspayteachers.com/Product/Shape-Attribute-Posters-and-Sorting-Activity-1809413 Mrs. Navarre's TpT Store www.teacherspayteachers.com/Store/Anna-Navarre