Dew
noun
The kanji and the word are exactly the same. That means they share meanings as well.
つゆ
This word uses the kun'yomi reading of the kanji, but you haven't learned it yet. Here's a mnemonic to help you: Dew is just the earth's way of giving water to you (つゆ). Rain is too forceful, you may not go to the ocean or a lake, so the earth gives dew to you by putting it on the grass outside your house everyday!
葉っぱの上に乗っている露を集めているんだ。
I’m collecting dew that’s on the leaves.