This is a mobile I made for my new niece in Australia. I didn't get I photo of it before hand so this was taken after it arrived (it looks a little squashed after it's long trip).
For the crochet birds I used a pattern from a Japanese Craft Book called the 'new collection amigurumi' which I got my hands on via etsy. I've since seen lots of similar pattern books free online (in Picasa Web Albums) like this one (link) which looks very cute too. Also have a look at this album in Pinterest (link) it's full of good links.