This fits your. Make sure this fits by entering your model number. A completely interactive way to demonstrate the changing forces of gravity on the different planets! Includes over 40 fun facts and 2 modes of play! Helps kids understand gravity, weight, mass, and basic astronomy. Includes 45' round galactic planet mat printed with 9 celestial bodies and a scale that calculates your weight in lbs. or kilos (up to 300 lbs.). Features the voice of Dr. Neil deGrasse Tyson, director of the Hayden Planetarium at the American Museum of Natural History in New York City. Requires 3 AA batteries (not included).