I had a thought-Cynthia would be perfect to try the sling with. We rocked that sling in dowtown Chicago!
Molly is almost 6 months old. Brendon is 7 weeks. Although they're the same size, there's obvious differences in developmental age. Molly is just about sitting up on her own, Brendon just about holds his head up on his own. Molly will smile and respond to you, Brendon just stares. They do coo and grunt at each other occasionally though.