We didn't want our kids to experience McRaunchy's until much later in life. However, when I went into labour with my middle child, my father took the eldest (21 months old at the time) to McD's for a "treat."
She's been addicted ever since.
My middle child was only ten months old when she took up fries, and the youngest was maybe six months old when grandpa gave her her first golden stick of death.
Evil - pure evil.