The joy of laughing.... (at the simple things)

We have realised that 21 month old Eva is blessed with a great sense of humour. She actually get a joke when someone is joking around with her. Today while driving (my stories always seem to occur while driving) Eva started laughing to herself in the back of the car, i turned to her and said 'What's so funny Missy Moo' and she pointed towards a overhead electrical wire and said 'There's a shoe up there' and laughed again... how could she know that this is a silly place for a shoe