Awww, cute man, it's such a lovely age and kids have such curious minds, they ask the best questions. My daughter is turning 5 next month and she asks such cute things. It's wonderful to be able to share information with them and see how it makes them thing about being an animals or wondering what frogs eat and how the stars in the skies work only at night. It's adorable. Enjoy every minute of it, it goes by so fast.
Hugs to you. Have a lovely day