Winter Math & Art Project Based Learning Activity - Gingerbread Cake with Chocolate – Printable & Digital (EDITABLE). Use this enrichment activity in your classroom to have your students incorporate critical thinking, and Christmas Math in a fun way. Students will practice finding the surface area and volume of prisms. They are invited to a challenge. They need to design a modern gingerbread cake filled with chocolate. This resource includes:- The digital version in Google Slides™. - The e