Why not? Small children from the age when they can understand what we are talking to them we can teach them to keep targets to finish or goals to achieve.
The older they are they are, they can set their own goals and our role will be in just assisting them or guiding them towards that.
Most often parents set their targets and place that as kids goals which is fundamentally wrong; only if they set their own goals, they ll have the motivation to achieve them.
Parents can help them by reading stories, showing TV programs, Ted talks, helping them meet people related to the achievement of the young ones goals etc.
There is no age bar in keeping goals and achieving them – so we adults also can make our own goals to achieve