I don't really like round robins at all. Especially if you only put 4 kids in 1. I think 5 is the minimum. The reason I say this is becuase most tournaments give medals to the top 4 places and I don't beleive in giving a kid a medal just for showing up and lossing every match. There are some who beleive you should get something just for an effort but I think a simple pat on the back and some words of encouragement is enough.