This entertaining Step 4 leveled reader introduces kids to Ben Franklin and his many inventions, including the story of how he created the "magic square." If your child likes sudoku, they'll love learning about the magic square! A magic square is a box of nine numbers arranged so that any line of three numbers adds up to the same number, including on the diagonal! Teachers and kids will love finding out about this popular teaching tool that is still used in elementary schools today! The story also includes many charming and funny anecdotes about one of our wittiest founding fathers--including the fact that Ben Franklin had a pet squirrel! Step 4 Readers use challenging vocabulary and short paragraphs to tell exciting stories. For newly independent readers who read simple sentences with confidence.