It is made out of odds and ends from my yarn stash. I dropped the purple yarn in coffee by mistake 10000000 years ago. I didn't have enough to do the whole mouse in one color, so it has a big nose.
I am an expert level knitter... but this mouse is crochet! I've known how to crochet for a long time, but there's very few patterns I look at or things I want to make that I wouldn't rather knit.
You can find the free pattern on Ravelry or use a search engine--the title of the pattern is "Battersea Mouse."