This chapter illustrates the practical use of the GranOO workbench to build numerical experiments. It presents useful tools given with the GranOO distribution. The chapter introduces some of the main tools of the GranOO workbench, located in the Tool. It then presents some Discrete Element Method (DEM) simulations involving granular material as well as continuous material. The first example (aka the bluewave) is a granular flow DEM simulation. The chapter shows how to manage contacts between discrete elements and how to move a bounding shape due to local frame management. The next set of examples discussed deal with DEM continuous models. They show how to calibrate the microscopic properties, use numerical sensors and impose rotation on free faces for modeling a torsion test. The last example studies the silica glass grinding and illustrates a model that mixes granular and continuous DEM formulations.