An Apollonian pumpkin patch and Sierpinski candy corn:
Great ideas for mathy porch decorations:
My favorite blood-thirsty online game from Murderous Maths:
And here’s some less-violent holiday math for the younger set:
Do you know of more mathy fall fun? Share your links in the comments section!
Denise Gaskins' Let's Play Math 
Oh my gosh, thanks so much for these links! They’ll come in very handy. 🙂
I’m glad you like mathcraft’s post on pumpkin carving! I’d love to have people contribute and let me know what they’d like to see. I’m willing to research and try most anything and really love just about everything related to math, art, and science.