With electronic sounds module attached to extended back cover Electronic sounds module attached to extended back cover Electronic sound module attached to extended back cover With electronic sounds from panel attached to extended back cover Book with electronic sounds from panel attached to extended back cover With electronic sounds, on plastic panel attached to extended back cover Board book with electronic sounds from panel attached to extended back cover Board book with electronic sounds from panel attached to extended back cover. Board book, with electronic sound module attached to inside back cover Electronic sound module attached to back cover.