K.N.
I have almost 3 year old twins a girl and a boy. I started potty training my daughter at around 2 because she was interested in the potty and it worked. We used a chart system, where she put a sticker on the chart when she used the potty, when the chart was full she got to bring it to chuckie chesse, which she loved. It worked for us. My son on the other hand was not ready and interested in the potty until recently. If they are interested in the potty and are showing signs of readiness then start introducing the potty and see how they respond. Remember they are both differnt and might not potty train the same and make it fun.