STEM Challenge-Hydraulic Powered Robot Arm Challenge Each group in a class is challenged to build a hydraulic machine suitable to lift the materials given. Grade/Level: 7 Overview: Constructing Hydraulic machines by understanding and applying mechanical and hydraulic systems using EDP Process. Learning standards: Students demonstrate an understanding of the process and phenomena of fluid mechanisms. Students demonstrate applying scientific concepts in daily life and solving problems Students demonstrate an exhibition of creativity in designing models using eco-friendly resources.