Like little kids

Yesterday, Alt Tab and I were at home watching Dr. Phil, who was saying that normally little kids don't notice if another kid is 'abnormal' - like if they're really tall or short for their age.
It reminded me that when I started school, in one of the most racially diverse parts of Melbourne, I never noticed race - until it was pointed out by adults. The Asian, Indian and Arab kids didn't seem particularly different to me or the other European kids.
Jesus said that his Kingdom is made up of people who are like little kids (Luke 18:15-17).