I took my LO (who turns 4 months tomorrow ) to the library story time today and she LOVED it. I sing & play with her at home all day long but I guess she likes socializing, which is something we don't do frequently cause we know babies who are way older or toddlers. I'm considering doing a Little Gym/Gymboree type of class. Has anyone done one with a younger baby? Was it worth it? Any thoughts?