The study of three dimensional objects can bring out the natural maker and builder in your students. This collection explores three dimensions through the use of maker projects, 3-D nets, and studies of area and surface area. The cardboard challenge is an annual contest that motivates students to use their imaginations and explore construction and three dimensional objects in unique ways. Incorporate lessons on visual thinking, nets, surface area, and volume, etc. so that learners expand their true understanding of the relationships between them.