I love making homemade dough too! I was out of food coloring this month though so we went with standard play-doh (we do a color of the month, and the color was blue), but next month is orange, so I'm doing the orange with pumpkin pie spice, etc.
Hey, thought of you when I came across this link just now...crafty homemade artsy goodness :-) http://www.artistshelpingchildren.org/
Have you tried Pumpkin Pie Playdough? Smells so nice! http://www.heidisfullplate.com/2009/10/pumpkin-pie-playdough-recipe.html
I absolutely love your blog!!! Thanks so much for taking the time to share your ideas - I've gotten lots of great ideas from you (not to mention motivation to actually DO the fun and educational activities I have in my mind)! I do have a question and I hope it's not too personal: How old is your daughter, O? I find it helpful to have a frame of reference when I'm contemplating activities for my daughter, who is 2.5 (born 4/2007)