A.S.
I am not sure if you are asking for the grown ups or for the kids, but here are the free things we do as a family:
1) hike the trail and visit the playground on Rainbow Mountain, in Madison. (Nice trail!!)
2) Barnes and Noble (off University)- we get to read and the little one gets to play at the Thomas the Train table, plus pick out books for us to read to him while we are there. If you get thirsty, you can always raid the water or lemon water at their cafe.
3) Southerland Station (off Governor's, behind Captain D's)- a fantastic train table, plus a construction truck box where you load and unload balls into an elevator type machine (this is a small game, but it is still fun and amusing).
4) Under construction until ?July?, but Madison Square Mall has a fun play area where the kids can run wild and wear themselves out.
5) Not exactly the classiest thing to do, but if you have a Sam's Club membership, there are always enough free samples to count as lunch ;)
5) Dublin Park- walk/rollerskate the paved trail, play in Kid's Kingdom, collect tennis balls in the bushes around the tennis courts (after/before the staff/students have played and picked out the balls they want to keep), fly a kite, play frisbee, have a picnic.
Well, that is all the free stuff I am aware of. If you hear any good ideas, please share them with me!!
--A.