Taylor's riddles

Whoever answers all of these riddles right gets a free candy from the snack shack :) 1. You throw away the outside, cook the inside. Eat the outside and then throw away the inside. What did you eat? 2. What goes around the world but stays in a corner? 3. The man who invented it doesn't want it, the man who bought it doesn't need it, and the man who needs it doesn't know it. What is it? 4. Throw me off the highest building and I won't break but put me in water and I will. What am I?