Good Riddles

Question: Those who make this item, don't use it. Those who BUY this item, have no need for it. But those who USE this item, never see it. What is the item?

Question: A dad frog goes ribit and a mom frog goes erbit what does a baby frog make

Question: A powerful spell, the naive knows it well; one cast at an affair for your most popular gown. No sticks, no stones, a mage sans tomes, a fight, no toil but it still breaks you down.

Question: At low tide 14 rungs of a ship are above the water, the rungs are 15 centimeters apart. each 15 mins the water rises 15 centimeters. after 2 hours and 30 mins how many rungs are above the water?

Question: A spirited jig it dances bright, Banishing all but darkest night. Fire can't kill it but water can. Share it, it won't get less unless wind will ruin it.