This document provides a lesson plan for a 4th grade science experiment to discover the properties of Oobleck, a non-Newtonian fluid that exhibits both solid and liquid properties. Students will add small objects like marbles and pennies to Oobleck and observe what happens. They will also touch and explore the consistency of Oobleck. After experimenting in groups, students will share their findings and write about their experiences in science journals. The lesson aims to teach students that some substances can have mixed properties.