Baby Butterfly kisses

Nathan has started to give me butterfly kisses in my tummy. Or maybe he is just kicking me. :) Either way, we have the feel of movement. It is still very faint, but it is there. Justin can't wait for them to get stronger so he can feel as well. I am curious what Logan will do if/when he feels it. Every morning the last thing we do right before we walk out the door is put on Logan's shoes. He will sit in between my legs and just lean back on my belly. I am sure it won't be too long before he gets a kick. How early does sibling rivalry start? :)