Colin at five months.

Take a look at today's milestone! Colin sat by himself several times this evening, supporting himself on both hands or even, for a few seconds, one hand. He has great core strength. He's also been flipping from back to front this week, so it's been a busy time on the gross motor front. Hmm, maybe that's why his sleep has gone all to hell.

He's not quite as preternaturally easygoing as he used to be. He really wants to be held in a standing position a lot of the time now. Or walked around so he can see things. If we fail to satisfy these urges he whimpers and cries. When I put him on the floor, he twists himself around or flings his body sideways after a toy. He likes to grab onto the toy basket. Or this morning he managed to maneuver himself around until his feet were on the swing, and then happily pushed it back and forth. He's an ingenious little guy.

He is still very happy, just in general. He has a full-force laugh that breaks out at the slightest provocation. I've never known such a laughing baby. Alex has the easiest time making him laugh. (This morning, all it took was his first good sight of her, and he was cackling with glee.) He likes it when we make silly sounds for him. He likes to play peek-a-boo.

The cutest thing he does these days: Whenever I hold a glass to my mouth when he's in my lap, Colin puts up his hand and pushes the glass, as if to help me drink. He is very serious about this and puts in sustained effort.