The Montessori didactic apparatus manufactured and sold by the House of Childhood, Incorporated, New York City This book, "The Montessori didactic apparatus manufactured and sold by the House of Childhood, Incorporated, New York City", by House of Childhood, is a replication of a book originally published before 1913. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.