Monday, January 25 RiddleOnline version Here is a riddle from ¨Difficult Riddles for Smart Kids¨ by M. Prefontaine. by Jessica Carsrud 1 When you do not know what I am, then I am something. Hints 1 When you know what I am, then I am nothing. 2 Some of you enjoy me and some of you do not. 3 What am I?