M.T.
Hello L.!
Some of the baby/kids gyms (like Gymboree or Little Gym)will let you try out your first class for free. I would recommend asking them if you can do a trial class before you sign up...If you can afford the high cost of these types of programs, they are great!
If you are interested in getting a little exercise in yourself and if you practice or are interested in practicing yoga, you might want to try out the Toddlers and crawlers postnatal yoga class at Yoga Yoga. It is so much fun!!
http://www.yogayoga.com/postnatalyoga
Storytime is also a great free way to get in some play/learning time for your little one. The Books and Babies program is awesome! We usually do a weekly all ages storytime as well as pajama storytime (a fun way to get your little one good and tired before bedtime...I wish they did this EVERY night!!)
http://www.ci.austin.tx.us/library/storytimes.htm
There is a new baby/child class in Austin called Wee Voices. We have never checked it out, but are going to a first time free class next week. Looks like it will be a lot of fun!!
http://www.weevoices.com/Home_Page.html
Sign up with Baby Scoop Austin to learn about more places and things to do with your baby.
http://www.babyscoopaustin.com/share.asp
Good luck and have fun!!