Board book, with clock face and plastic clock hands attached to inside back cover. Shaped board book, with clock face with plastic hands attached to inside back cover Board book, with electronic sound module attached to inside back cover Board book ; with moulded plastic light inset into inside back cover Board book, with foil mirror attached to inside back cover Shaped board book, with electronic sound attached to inside back cover. Audio CD in plastic pocket attached to inside back cover. Board book with electronic sounds from panel attached to extended back cover. Board book with squeaky nose attached to inside back cover Board book with electronic sounds, on plastic panel attached to extended back cover