MORE Whistle While You Work Author:Eric Jensen you enjoyed our original, best-selling Whistle While You Work CD and are looking for more variety, pick up a copy of MORE Whistle While You Work. Like its predecessor, this collection of classic compositions is specifically produced to activate the serotonergic (serotonin) system. Play these carefully selected, 60 to 75 BPM tracks ... more »as background music during group activities, while students are working on projects, or anytime you want to encourage a sense of accomplishment and well being. Playing Time: 60 minutes« less