Time the sits to start about 10 to 20 minutes after each meal and during times when your child usually has a bowel movement. You'll be able to tell these times from the toileting diary. Your child should sit on the toilet at least three to five times per day, for about five minutes each time. Reward bowel movements in the toilet. The first time your child has a bowel movement in the toilet, give him or her a reward.
Good rewards are stars on a chart or fun activities.
At first, give a reward after every bowel movement in the toilet. Later, give the reward after every few bowel movements. Pretty soon your child will be trained. Then you can stop giving rewards. Next, teach your child to know when it's time to go to the toilet.