H.S.
I usually go to Mt Scott as soon as it starts raining. It's only $1 per child, so not free but pretty cheap.
I also meet with a mom's group most weeks, I have a 2.5 year old and most of them have 1 year olds or less, so I am sure my daughter would like to have a 3 year old around. We go to parks, or coffee shops usually. I also have an art playgroup at my house on Fridays. Most of kids are in the 2's almost 3 age group.
Storytime at the library is free and we try to do that every week. Woodstock library is great, don't know how far you are.
If you want send me a message and I can let you know when we meet next.