Kids Riddles

Question: The more it dries, the wetter it becomes.

What is it?

Question: How can you create 3 squares moving exactly 3 sticks?

Question: What is black when you buy it, red when you use it, and gray when you throw it away?

Question: If you have three apples and four oranges in one hand and four apples and three oranges in the other hand, what do you have?

Question: My first two are male, and my first three female.
My first four save them both, and my whole is a female of the same sort.

What am I?