Timers that include an automatic mechanism to activate the timer in the future on the due date for the birth of a baby; devices to indicate when the due date has been reached for the birth of a baby in the nature of a battery-operated plastic egg that slowly hatches until on the expected day when it opens to reveal a tiny chick; devices to change appearance as the birth due date of a baby approaches in the nature of a housing which opens to expose a replica of young animal as the due date of ...