The Cardboard Challenge is a yearlong event that celebrates children’s collaborative effort to build projects using cardboard materials. In conjunction, The Global Day of Play takes place on the first Saturday of October each year and encourages families, friends and the community to come out and celebrate children’s creative efforts throughout the year. Families at Knott CDC celebrated the event by building several projects out of cardboard. The children were divided into groups and planned out the projects they would build. Castles and houses were just a few to name of the many amazing pieces.