Discover kinetic and potential energy with a fun marble science investigation. Simple supplies and EASY PREP. Explore deeper with a further exploration. Engage students in a STEM Challenge to create a Newton's Cradle. Includes extensive background information to guide the teacher and students to success. This is a printable PDF. Please read more about Easel below.Students will expand their knowledge of forces and motions by observing the transfer of potential energy to kinetic energy. Throug