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.
If you decide to wait until a later potty training age, you can still put this time to good use. The interval between 12-18 months is the perfect time to start thinking about toilet readiness--a set of skills and interests that will help your child master advanced toilet skills later on (see below).