Little Boy Ingenuity

This morning Sean was sitting by the window in the front room reading a book with a glossy cover. I was sitting on the floor stretching, when he said, "It's like a kite!" I looked up to see he had discovered he could control the reflection of the sunlight off the front of his book, and was moving it back and forth and to light up objects in the room: the table, the ceiling, the cat... A "light kite!" How clever of him to think of it in those terms?