Sea Legs
And he's up! Well almost. I mean can you imagine the strength it takes to get to this position? The kid is gonna stand (maybe walk) before his birthday I tell ya! I'm so proud of him.

***From the start, babies want to explore their world. They are eager to move their eyes, their mouths, and their bodies toward the people and objects that comfort and interest them. They practice skills that let them not only move closer to desired objects, but also move desired objects closer to themselves. As they grow, children's determination to master movement, balance, and fine-motor skills remains intense. (Taken from The Whole Child - Physical Development)