To accustom child to a pot it is possible in the age of from 18 about 24 months. Usually in this period of life kid begins to find out and to supervise desires.
The best way to teach child to sit to pot in the necessary time is showing him, how it is done by senior children.
Set child on a pot and explain to him purpose of a pot.
Set kid on a pot always in the same time each day.
Praise child, if he does not refuse a pot.
Never force child to sit on a pot, if he does not want.
If kid begins to oppose, hide a pot on some days.
At studying to a pot also teach the child to hygiene. Explain how to lower water in a toilet how to use a toilet paper.