To that end, the Feels will come to those witnessing or living through a particularly moving moment when their heart is fullest and add additional emotion until the heart can no longer contain the pressure.
Most parents start the training when their children are between two years and three years old. But there's no official age, and you needn't potty train your toddler at all if you don't want to.
When Kids Start Potty Training. Although many parents feel like three years is a magic age by which a child must be potty trained, that is not always the case. For example, a poll on keepkidshealthy.com showed that almost 25% of kids weren't potty trained until they were three-and-a-half or four years old.