Entropy Concept Confusion.?

A system such as the rice in the glass can become more ordered and less entropic because it is not isolated from other influences. By your movement and "banging" in on something solid, you are lowering its entropy by increasing your own entropy and that of the solid object against which you are banging it. Both of these "connected bodies" acting on the system of rice and glass use organized physical and chemical energy of your muscles and the solid object to produce heat energy in the objects. The overall system of glass, rice, solid object, and your body has an increase in the total entropy due to the dissipation of the organized chemical energy into heat (disorganized) energy, overriding the decrease in entropy of just the rice.