L.L.
i would not suggest candy but extra time with you. an extra story at or an extra 30 min at the park, if he goes number 2 in the potty. they say food should not be used as a reward for everyday behavior. they will see it there and want rewards for other things like brushing teeth. he might have had a hard bowel movement that hurt and that scared him. also do you have a stool for him to push on. its hard to push with out using your legs. hope this helps