In this paper I discuss the possibilities for exploring the hundred chart kinesthetically with elementary preservice teachers using a life-size hundred chart--an innovative tool, homemade from a shower curtain--to build quantity sense. Preservice teachers explored creative approaches to teach mathematics using the life-size hundred chart and planned engaging movement activities for young students. I detail the activity prompts for students, sample lesson ideas from preservice teachers, and reflections from those who implemented the tool in their instruction. I provide additional suggestions for teacher educators to use this tool in building quantity sense with their students.