Qt pie. Great pattern for the legs and body, but the rest of it doesn't look 'filly' to me, only.. chibi, sort of, for lack of better explaination. You kept the filly stature, but missed the mark on the features that distinguish a younger pony from an adult. Namely her messy hair (hard to sew I bet, especially with different colors) but just making the mane more lifted and spiked upwards instead of falling over her face would help. Head shape could also help immensely to make her look younger.. more rounded top skull and larger eyes. Eyes big enough to just border on disproportionate. Tail could be shorter too, and maybe not make the chest so pronounced. I see the pattern you used has a rather pronounced, 'puffed out' kind of chest and up towards the neck area. I hope you don't mind critiques, hope it can help you in your future filly plushies.