I'm confused. Why do you miss First Fridays? They had one in December...are they going to stop having them? I hope not, I really enjoy them too.
I'm assuming you want something the whole family can do. Depending on how adventurous you guys are as parents, the skateboard park right off Cox Creek Pkwy is free. You might want to wait on a warmer day than today...no doubt, in Alabama, it will come.
If you have younger kids & have not visited the Children's Museum, you are missing a treat. Moms and Dads are never to old to play...loosen up & let your imaginations loose.
I'm sure you've been to Spring Park, but sometimes we forget a simple day out at the park is sometimes the most fun. Pack a picnic, a football or frisbie, something to feed the ducks, a little change to ride the train, a kite and whole lot of love, and you've got a great memory for your kids to cherish.