Who needs a stairmaster when you've got a chairmaster!

Maybe it is because we don't have stairs in our house to worry about that I have paid much attention, but in what I've read about babies I haven't come across anything to know that they have some kind of built-in know how to climb up things. Much less wobbly things like this rocking chair. Yet here Anabel is, without any stairs to practice on, climbing away. Under close supervision of course :) (Apologies for the low res video from the Berry Cam).