Constipation is a common problem in toddlers . You don't have to worry if child is active , no abdominal distension , vomiting etc . In case he doesn't pass and is uncomfortable due to it we can use a suppository through the anal route . But we can wait for a day or two more for spontaneous expulsion Prevent it from happening again  by including fruits and vegetables in the diet . Make a fixed time of the day to take the child for passing stool ( generally after a major meal like breakfast or lunch ) as children have a tendency to hold poop if they are busy doing some fun activity and this tends to constipate them .