An actual human heartbeat is the rhythm (drums) of special arrangements of traditional nursery songs. The songs on this CD actually stop babies from crying, soothe symptoms of colic, and help parents get their children to sleep through the night - without having to let them cry! Each CD includes a Parents Guide - An Introduction to Heartbeat Musical Therapy booklet with common-sense suggestions for bedtime routines that work. Satisfaction is guaranteed or the manufacturer will refund the full purchase price direct to the consumer. These recordings are used medically in over 8,000 hospitals and special care centers to calm listeners, induce sleep and assist in healing. They are also used in over 1 million homes to help establish regular healthy sleep schedules for children and to help families get the rest they need. They are effective for listeners of all ages - from prenatal to elderly - but are recommended for prenatal to 6 years. They can be started at any age. They can even be used during the last trimester of pregnancy to help both mom and baby get a good night's sleep.