Wait for your toddler to be in a generally positive mood before you try to teach him anything about going to the potty. Show and tell. Little ones love to imitate, so let your son watch Daddy go to the bathroom. Try some gentle peer pressure. If your toddler has a few slightly older friends also in training or if he's in daycare, they may be of help by showing him that going to the potty is what big kids do.
Children are more likely to use the potty they choose, as well as any associated props.
If you teach him to go to the bathroom in an adult toilet, be sure he can rest his feet on a stool. Dangling feet tense the rectal muscles, making it harder to have a bowel movement. Remind your toddler. Busy toddlers often ignore their body's signals and need a few prompts. Bare bottoms make training easier, too.