Isn't this cute? I made it to go on a welcome card for our friends' baby, due any week now. As a size reference, the rainbow's about 3.5cm across.
It just needs the edges neatening and a bit of pressing to flatten out the clouds. I'll post a picture of the finished card when it's all done.
(And while I'm showing off: here's a couple of photos of the birthday card I made for my mum last year:
1 and
2)
ETA: All the patterns I've used here come from
Caitlin Sainio's books.