hardlogic

An old man wanted to leave all of his money to one of his three sons, but he didn't know which one he should give it to. He gave each of them a few coins and told them to buy something that would be able to fill their living room. The first man bought straw, but there was not enough to fill the room. The second bought some sticks, but they still did not fill the room. The third man bought two things that filled the room, so he obtained his father's fortune. What were the two things that the man bought?
Common Wrong Answers
“A large piece of furniture”
A piece of furniture would take up space but would not fill the room with something like light or air, which is the key to the riddle.
“A blanket”
While a blanket can cover an area, it does not fill the room in the sense of creating an atmosphere or illuminating it, which is what the riddle emphasizes.
“Balloons”
Balloons can fill a space visually, but they do not provide the metaphorical 'filling' that light does, nor do they create the same impact as the candle and matches.