Abstract: A magnetically interactive substrate is provided for a book. The book includes a plurality of interactive substrates in the form of a sheet or a panel of material. Each of the interactive substrates includes magnetizable areas or portions printed thereon. The magnetizable areas are printed using a magnetic ink formulated by magnetizable particles added to an ink formulated for a preselected printing process. The magnetizable particles are shaped and sized to be compatible with the preselected printing process. A plurality of removable play pieces are adapted to be attracted to the magnetizable areas on the substrate. Each of the removable play pieces includes a substrate or support member on which magnetic material is applied. The magnetic material allows the play piece to be selectively positioned on the magnetizable areas.