An old man decided to give all his life savings to one of his 3 sons, but he didn’t know which one.
So he gave each of them 1 coin to buy something that must fill the whole room. The oldest bought cotton but it was too small to fill the whole room, the middle son bought hay but it still was too small but the youngest one bought 2 things that filled the whole room and immediately he got him his father’s money.
What were those 2 items?
Candle and matchbox, the light of the candle will fill the entire room.