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