A friend of mine was babysitting for a little girl who was almost two. Every day the little girl would take off one of her socks and 'hide' it. At first it was really easy to find the sock but the day came when my friend could not find the sock anywhere. She asked the little girl and the toddler just smiled. My friend looked all day for that sock. When the toddler's mom came to pick her up my friend explained about the missing sock. When the mom asked the little girl where the sock was the toddler sat down and pulled both socks off the one foot! Smart kid!