Build your knowledge of mathematics as you help out the LeapSchool students! ? Explore weight and volume by mixing up special bubble bath potions  ? Learn about measurements、 proportions and geometry when you make stuffed animals and create games  ? Sell your creations to raise money to make repairs around LeapSchool  ? Appropriate for children ages 4 to 7 years (grades pre-K to 1)  ? Works with LeapPad? learning tablets and Leapster Explorer? game systems (sold separately)、 not with Leapster? or Leapster?2 game systems