Potty Training Woes

We are trying to find something to make TJ want to start potty training.  With Libby it was easy once we figured out when she was ready.  She just wanted to make a phone call to her Mimi or Grandma every time she went potty.  DONE!  With TJ, I noticed over Valentines Day the boy had a serious addiction to M&Ms.  So I got a bag in the hopes this could be our ace in the hole and get him to start at least sitting on the potty.  Not working yet but who knows!