Aside frome buying lime putty from our store - main ingredient in fresco plaster (sand is the other one) and mixing plaster yourself...
you can get "Base Materials Kit" for children classes
we will replace tiles and brushes (from the kit) with some fresco paints for you. That would be everything you need.
Fresco supplies as art supplies are not available in US.
alternatevely you can study this topic:
in our forums to learn how to use industrial materials for fresco experiments (only for experiments).
learn fresco at http://FrescoSchool.org
fresco painting video tutorials: http://www.FrescoSchool.com
Fresco School Video Channel
Contemporary Fresco Gazette
commission fresco or mural http://iLAdesigns.com
Contemporary Fresco Painting Resouce Center