Keep up George!

My street blip today reminds me of the ancient riddle:

"What walks on 4 legs in the morning, 2 legs in the afternoon, and 3 legs in the evening?"

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travelers who passed by. If the traveler failed to solve the riddle, then the Sphinx killed him/her. And if the traveler answered the riddle correctly, then the Sphinx would destroy herself.

The answer of course is Man!

I don't think the sphinx anticipated zimmers or in this case more than one walking stick!