What appear to be hairs standing on end on the cats back, are iron filings, held up in a magnetic field.  In response to the viewer, a motion sensor is triggered, which causes the "hairs" to move.

Helvetica Light is an easy to read font, with tall and narrow letters, that works well on almost every site.

Nelson

Magnets, Iron filings, fiberglass, metal, motor, motion sensor, paint

35"x30"x18"