The press reports: If you know nothing about Metallica, "Enter Sandman" does sound like it could be the title of a lullaby.
A company called Baby Rock Records has released lullaby versions of tracks by Metallica, Coldplay and Radiohead.
Baby Rock Records did the lullaby tributes because they love the music of all those artists. Executive producer said they tested the CDs on babies they knew and she can vouch that one crying baby fell asleep while listening to the Coldplay disc.
The Metallica, Coldplay and Radiohead versions came out on August 29.

Future editions will feature lullaby versions of Tool, Smashing Pumpkins, Bjork, Nirvana, Queens Of The Stone Age, No Doubt, The Pixies and Pink Floyd. Aiello said while a lot of the music works well in this format, some songs just don't work. She said even though "Rape Me" by Nirvana was a hit, it just wasn't the best choice for babies.

Source:	blabbermouth.net
Band profile:	Metallica