I picked up six copies of the same toy from the dollar store a while ago.  Each one contained several LED's of various colours. Also, they would flash at different rates with every push of the on button. One push would turn on the lights and they would slowly flash (maybe once every few seconds).  Another push and they would flash faster.  A third push and they went almost strobe speed.  Well I tore a couple of the toys apart and gathered the riches to light an X-wing.  Fibre optic feeds the indicater lights in the cockpit.  Looked really cool when I mocked it up to have different coloured lights blinking at various rates.  I guess the moral  of the story is take a gander at your local dollar store.