Newton's Dream is a kinetic sculpture at the Franklin Institute where you can watch dozens of golf balls shooting around metals tracks in a three-dimensional maze. There are ten different ways a ball can travel from the top of Newton's Dream down to the bottom.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.