M.,
I also have a 13 month old (daughter). I also have a 2 1/2 year old and am a stay at home mom. We moved here in August. I send my kids to a parents day out and it is great. A good program that I know has spots for now and in the fall is Covenent United Methodist church. It is off of Germantown. They have a website with info, just google it, I don't have the number handy. Your son could go 2 days a week from 9:30 - 2:30. I really like the MDO programs. Also, it is a whole lot cheaper than a regular daycare center. If you have any questions let me know. If you want to look around, just look for churches with MDO programs. I will warn you though, most fill up pretty fast.
Jen