The recorder is a family of woodwind instruments of the group, that includes the tin whistle. A standard recorder has seven holes for fingers (with the lower ones doubled) and one for the thumb. The recorder was a popular instrument during medieval times, and through the baroque era, but its use declined in the 18th century with the rise of other woodwind instruments such as the flute and oboe. It was largely revived in the 20th century, not only due to rising interest in historical performance, but also because its simplicity makes it a great teaching tool. Currently, recorders are crafted out of wood, plastic, or sometimes ivory.