Here he is at 12 months,
apparently engrossed in some rather heavy reading:

At 18 months, still reading, albeit somewhat less seriously:

Drinking coconut water by the roadside in India (December 2004):

and then by the ruins at Tulum in Mexico (March 2007):

Thoroughly enjoying the hot-cold of the water, where the Boiling River meets the Gardner River at Yellowstone National Park: