A Cuddle of many colours

I'm a bit late to the party (so nothing new there then!) but I have just cast on for the KASCuddle KAL and we are making these...

Sleep sacks for aids orphans and and abandoned babies of Africa.

My tardiness is not entirely my fault - the KAL called for 21oz of worsted weight in 100% wool, which is used double. Well at a quick reckoning that would be well out of my budget - but then I discovered (thanks to the Ravelry forum) that, as long as it's composition is labelled any other fibres are acceptable too. So I dived into my stash, and with a bit of (hopefully) clever yarn combining, I think I have come up with equivalent thickness in a reasonably high wool content, which should be nice and warm - it's just going to be rather multi-coloured, but I don't suppose the bubbies will mind.