L.B.
I let my daughter pick out some really cute ruffle big girl panties for when she starts going on the potty(7 pair one for each day of the week)(but not a pkg, individual ones she picked out herself) and I would not let her wear them until she went on the potty. I wasn't mean I just told her we were picking them out and as soon as she goes on the potty, she can wear them. She learned the next week. She was not quite 27 months-but she did have very good verbal skills so she completely understood me.
Now my son I had to bribe with skittles he was almost 3, but 3 or 4 skittles each time he sat on the potty and had success worked wonders- all kids are different but both my kids trained easily-my son was not ready at 2 like my daughter was.
GOOD LUCK