The work surveys the use of mobile educational campaigns that mount exhibits, demonstrations, films, and services on trains, trolleys, and motor trucks to reach communities. It explains purposes, advantages, and limitations; compares trains and trucks; and reviews applications such as agricultural, health, safety, child welfare, and food conservation tours. Practical guidance covers planning, advance publicity, local organization, program design, exhibit car layout, staffing and logistics, rates of progress, visitor reception, and follow-up evaluation. Case examples and an appendix of past campaigns illustrate costs, publicity techniques, and operational details to help planners adapt methods to local needs.