You can look for micro crochet in general, but I really love the patterns by NanysOops (Anastasia Kirs). They are very cute! Lots of little creatures like a dragon, bunny, koala, red panda and much more (^-^)
You can crochet almost everything with thin yarn. But it's the easiest to try something not that experienced. I've made a mouse and a bear with thick sewing thread :)
io pernalmente non lavoro i filati sottili , ma mi piacciono molto le creazioni di Alisa Verbitskaya ( la trovi su FB) e puoi avere un'ispirazione su cosa fare ;)