Perhaps you remember our hesitant stair climber, Lydia.

Lydia was about eleven months in those photos. Heidi is eight-and-a-half-months, and on Monday morning she conquered that steep second step.

Except that I didn't get it on camera. You'll just have to imagine that last scene.

Lydia's constant playing on the steps to get her toys away from her sister may have been a motivating factor for Heidi. Now Heidi can get to the toys, and Lydia is panicking once again.