Good Riddles

Question: I get dirty in about 5 days but it takes half an hour to clean me. It takes a long time for me to be tall but I can be short in about 2 seconds what am I ?

Question: Johnny's mom has 3 children. The first child's name is April. The second is May. What's the third child's name?

Question: Unexpected is my arrival. It is announced to all nearby. I protect you, yet you try to supress me. With my friends I embarrass you. What am I?

Question: What do you break before using it ?

Question: One becomes seven but each stands alone