This step-by-step process has students create a parallelogram through the use of a ruler and protractor. The markings they put on the diagram lead to the definition of a parallelogram (both pairs of opposite sides are parallel) and its subsequent properties: both pairs of opposite sides congruent, both pairs of opposite angles congruent, all pairs of consecutive angles are supplementary, and the diagonals bisect each other. Furthermore, the markings on the diagram help kids to recognize congruent triangles and reinforce the methods previously used (SSS, SAS, ASA, AAS) to prove them congruent. The subsequent discoveries of a rhombus, rectangle, and square are derived from this activity. The kite and trapezoid activities are also designed to give kids a thorough understanding of special quadrilarerals.