M.C.
what about a gymnastics class? i don't know if this is something that only moms take their kids to or not but I would think this might be less intimidating than a Gymboree class. Also, there are some infant swimming classes and I've seen lots of dad's there. story time at the library? might be a little old for your son though. My other advice would be for your hubby to just establish a routine. Every day go to the gym or the park, then to the hardware store, then to the library. I know that not all of these places will have other babies there but what's important right now is bonding time between parent and child. I think it's great that your hubby is staying home! What an amazing gift he is giving to your son and to you.