Good Riddles

Question: What grows up and down at the same time?

Question: Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?

Question: What happens when you throw a blue rock into the yellow sea?

Question: How can you make 7 even?

Question: I can bring tears to your eyes; resurrect the dead, make you smile, and reverse time. I form in an instant but I last a life time. What am I?