What are the two objects that the youngest son used to fill the room?

Question

There is a farmer who has three sons. Nearing his death, he asked his three sons to find two objects that can fill the room he's in. The one who can deliver will be chosen as his heir. So the oldest son goes to the market to get hay while the middle son go get leaves. The youngest son goes to a shop and buys two things that he put in his pocket. The oldest son's hay only fills half the room, the middle son's leaves fills 2/4 quarters of the room, while the youngest fills the room with his two objects.
Question: What are the two objects that the youngest son used to fill the room?

Answer 1

I think there are multiple answers for this like
1. Dry Ice - 2 Nos [Fills the room with CO2]
2. A small pocket sized lamp or 2 [Fills the room with Light]
3. Candle and Match Box works too ! [I think its the better answer]
4. Incense Stick And match Box can also work.
5. A portable speaker and Phone can work [Fills the room with sound]. etc.,

Answer 2

Answer:
A match and a candle is the best answer for this question