Materials: Bowl, Salt and Pepper, soap, and of course waater.
First put the water in the bowl. Take the salt and say, "here are all the white people swimming."
Next pour a bunch of pepper and say, "and here come the black people, they are having so much fun."
Finally put the soap on your finger. Before you put your finger in say, "and here's the mexicans"
I was experimenting with this while I was at Subway working.