My lo is 15 months and when you change her you lay the diaper on the floor she walks over and sits on the diaper is she ready for potty training?

Ready to try:: Get a potty and see what she does with it - readiness for training is highly individual.

Yes: Behvioral signs like what your mention may be the start to toilet training. Demonstrating a desire and showing interest are positive signs. If he broadcasts his bodily functions-announcing pee and poop and bowel movements are predictable and less wet diapers are apparent-you are on your way. Despising wet and dirty diapers helps.

Doubt it: Data confirm only 25% are potty trained at age 2 increasing to 75% at 3. I see nothing in the observation you provided to suggest anything more than she understands she is having her diaper changed.