Object permanence

There was a time in your life when the expression out of sight out of mind was literally true. Things were simple then! And the world was small.

Then one day it's all clear: "Hey, just because you put the telephone behind your back doesn't mean that it doesn't exists! In fact, I'm going to go get it..."

The other day we woke up to the realization that M is now much more persistent with the objects he want to get his hands on (and stick in his mouth). Enter object permanence.
Parenting just got harder!