21 Creative Ways to Teach 2D Shapes in Kindergarten But you can even create shape puppets to get them talking about what makes the shapes unique.. Consider using videos as well to teach describing 2D shapes - like how many sides and vertices each shapes has.. 3. Teach what makes a 2D shape a 2D shape. Teach what makes the circle, square, triangle rectangle and hexagon all 2D shapes in a simplified fashion.. I like teaching this when I introduce ...