Some crazy parents (they've got to be parents... and crazy... right?) have made lullabye albums of established rock artists' material available... so that you can send your child off to the Land of Nod with tunes by Tool, The Cure and Metallica bouncing about their ickle brains.

The latest in the range, a Nirvana tribute affair, features gentle interpretations of the likes of 'Smells Like Teen Spirit' and 'Heart Shaped Box'. It is, frankly, deranged. And oddly brilliant.

The website/label in question is Babyrockrecords.com, and alongside the Nirvana effort are collections of songs by Pink Floyd, Radiohead, Led Zeppelin and the Pixies. They describe their Nirvana compilation thusly:

You know it. With the lights out, it’s less dangerous. These lullaby renditions of Nirvana’s best-loved songs turn the volume way down, while turning up the dreaminess of their pop hooks. In many ways, this album echoes the simple pleasures and innocence of infancy and childhood. Childish tra-la-la’s tempered the distortion of Nirvana’s own songs. Chimes, glockenspiels and other gentle instruments temper Nirvana’s wild spirit for your little one. 'Smells Like Teen Spirit'? Smells like nap time.

The Nirvana album is out on October 31. Click here for the full range of albums, and check out the samples below!

Radiohead's 'Karma Police' here.
Metallica's 'Enter Sandman' here.
Tool's 'Sober' here.
The Cure's 'Just Like Heaven' here.
Nirvana's 'All Apologies' here.