Snow character animation

Snow character animation

I want to create an animation which involves some characters dropping from
top of the screen to the bottom. Something like leaves which are falling
from trees. This animation should have these features:
I want to be able to choose the font and size of these characters
(something like textblock)
I want them to tilt a little when they're moving (like leaves do)
I don't want too many of them but I want the performance to be satisfactory
Is this possible in XAML? I don't have much experience in complex
animation in XAML so I would appreciate if you could help me. Thanks.