Some folks like to focus on the milestones of parenting and of child development. I feel that it is important to be aware of the hurtles. Like milestones, hurtles correspond with the age of a child yet they are nuisances that you can't knock down or go around. You just have to get over them and keep going and try not to fall down.
Age 3: child discovers what a computer is and demands to be on it all the time. Child has also not mastered consequences or self control.
Age 3: wants to have shirt tucked into shorts/pants.
Age 3: child will not remember their own shoes when they get into the car in a garage and never need shoes, until you "arrive at destination".
Age 6: child teaches smaller siblings to say bad words and then gets mad when sibling says said words back to them.
Age 6: child mistakes the golden rule to mean do mean things to people that did them to you.
Age 8: wants to have shirt tucked into shorts/pants.
Age 11: wants to have shirt tucked into shorts/pants.
OK, I used to be very fond of tucked in shirts myself. My children are mine. I love them.