Mo. Rev. Stat. § 294.043
No child under sixteen years of age shall be employed or permitted to work in any street occupation connected with peddling, begging, door-to-door selling or any activity pursued on or about any public street or public place until the employer has received written permission from the director of the division of labor standards. This prohibition does not apply to any public school or church or charitable fund-raising activity.
(L. 1989 H.B. 461)