Iowa Code § 321I.21: Minors under twelve — supervision.

A person under twelve years of age shall not operate an all-terrain vehicle, including an off-road motorcycle, on a designated riding area or designated riding trail or on public land or public ice unless one of the following applies:

1. The person is taking a prescribed education training course and the operation is under the direct supervision of a certified all-terrain vehicle education instructor.

2. The operation is under the direct supervision of a responsible parent or guardian of at least eighteen years of age who is experienced in all-terrain vehicle operation or off-road motorcycle operation and who possesses a valid driver’s license as defined in section 321.1.