Andrew can climb stairs now.
You've been forewarned.
Do not turn your back on him if he is within ten feet of a staircase. He will rocket up those steps so fast that your head will spin.
Walking, I think, is imminent. He's already doing that thing where he reaches out toward something, and you think he's going to take a step, but then he thinks better of it, and he sinks to the floor. But he's working up his nerve. I think it's going to happen soon.
Who gave my sweet little baby permission to grow up?