Last night, as Curious George was watching TV before bed, and I was sitting next to him using the laptop, the baby was being very active. (as usual, at this time). I took Curious George's hand and placed it on my belly, and in the matter of seconds he felt 2 big movements. He was so excited! He said, "Baby kicked me 2 times!" Then we called Daddy and he told him all about it.
I've placed Daddy's hand on my belly, but he never got lucky.
Curious George is definitely the first to feel his baby brother move externally.