Stroller pushing: In the Olympics?

Blake's latest hobby is pushing his own Graco Metrolite stroller around outside. He has the endurance and stamina of some of the greatest Olympic athletes! I've included a couple of pictures. As you will see in one, he is open to diversions, but for the most part he focuses intently on moving the stroller from place to place for as much as 20 minutes at a time.

We are having fun with him and wondering if this is a precursor to walking! :)