@kibosh I don't want to rain on your parade, but just be aware that the poem represents how you feel about death... bear in mind that for the parents this may not be (almost certainly isn't at the current time, but of course you know them better) the case. The children did die. The grief is going to be terribly raw for a while and that poem, beautiful as it is, may seem to be 'glossing over' the pain they are feeling. Sometimes less is more in a card. I'm not saying don't - if you know your friends are at the point where they can see it like this then fine, but just be aware of where they may be on their journey through this.