The bread baking materials for first communion instruction demonstrate how the approving Bishops think about the Eucharistic Celebration.(kreuz.net, Herzogenrath) The catechetical materials for first Communion preparation are not suitable.
Pastor Guido Rodheudt of St. Gertrud in Herzogenrath described this during his lecture on the 14th Cologne 'Liturgical Congress' at the end of August from the article in the Catholic paper 'Tagespost'.
http://eponymousflower.blogspot.com/2011/09/bread-baking-materials-for-first.html