This summer STEM challenge is the perfect end of year activity to keep your students engaged through the very last day of school! The basic premise:In partners or groups, students will design and build two devices: one to slow the melting process (Keep it Cool) and one to speed it up (Make it Melt). Includes modifications for grades 2-8. *This challenge is perfect for addressing NGSS standards for energy and structure & properties of matter. See related standards list at the end of the resource