Riddle: There is a green house. Inside the green house, there is a white house Inside the white house there is a red house. Inside the red house, there are lots of babies. What is it?
Answer: It is a watermelon. Explanation: The skin of the watermelon is green (green house), the watermelon rind is white (white house), the watermelon flesh is red (red house), and the watermelon seeds located in the red flesh are the babies.