This is the mat that teaches young astrophiles 40 fun facts about the solar system and calculates a stander's weight on each planet. Voiced by renowned astrophysicist Dr. Neil deGrasse Tyson, the mat's speaker produces a series of facts as youngsters step onto each planet, introducing the concepts of gravity, weight, and mass. A Jovian landing results in "Jupiter does not have a surface to land on—just a thick atmosphere of swirling gases" while Mercury reveals it is hotter than a pizza oven during the day, but colder than a freezer at night. Stepping on the mat's integrated scale takes an initial measurement up to 220 pounds; stepping onto one of the eight planets (including Earth's moon) displays your weight on that planet. Requires three AA batteries. Ages 8 and up. 56" L x 45" W x 2" H. (54 lbs.)