We are unique in how we think, feel, and look. And still, we have similarities that make us very much alike. This is demonstrated in it's simplest form with Playdough, and a delicious form using apples.
Use one color of playdough. Give everyone an equal amount of Playdough commenting on the fact that everyone has the same Playdough. Instruct the children to make anything they want out of the playdough. At the end, have everyone place their creation in front of them and say to them that it's amazing that we all started out with the SAME Playdough, and now the Playdough is DIFFERENT. You are the same because you are children with the same Playdough, but different because you all are one of a kind and chose what to make your Playdough into.
Is This My Apple
(Books for the young child)
The Land of Many Colors, by Rita Pocock
Land of Many Colors teaches us to judge each other, not by the color of our skin, but by the content of our character.