Wrapping a div around every three divs

Question

Say I have 6 child divs and they don\'t have unique identifiers:

Answer 1

This should do it:

var $children = $('.child');
for(var i = 0, l = $children.length; i < l; i += 3) {
    $children.slice(i, i+3).wrapAll('
');
}

DEMO