Being able to walk to and from the bathroom, undress and redress
Seeming uncomfortable in soiled diapers and wanting to be changed
Asking for the toilet chair, showing interest
Wanting to wear big kid underwear
Having regular and predictable bowel movements
Willing to start training, showing no signs of fear
Child is at ease with using the toilet and doesn't fight you
Select a toilet chair or use an adapter. The adapter allows them to use the regular toilet with the aid of a step stool and smaller seat that fits over the regular toilet. This allows less transition when trained.
Take your child to the toilet on regular intervals. Don't insist the child sits there until he/she goes. This will only frustrate them and they may resist going back to the toilet. If they don't go after a reasonable time,try again in 20-30 minutes. But also try to avoid taking the child too often. If the child is truly ready mentally and physically the accidents will be minimal but accidents DO happen.
Remember to never scold or punish for a accidents. If there are repeated accidents you may need to consider that maybe they aren't ready mentally. They may also not be ready physically to hold urine. If you have ANY doubt, its best to wait for a couple months.
If the child is truly ready for training I recommend the use of training pants with plastic pants from the start. Pull ups in my opinion are too much like diapers and they may not feel their accident, however at night they are fine. It is completely a personal choice.
Most children will have achieved bowl and urine control by age 3-4 years. Any significant changes in their bathroom habits or continued accidents may warrant a call to the pediatrician to rule out other problems or for advice.
Most of all, If you and the child are ready mentally and physically for the task, training will happen quickly!! Patience, consistency and a sense of humor are the keys. Something someone told me one time when my daughter was training, I've never meet a kindergartner who was still wearing diapers
