We have upgraded our popular mobile app: MathJump, like a kangaroo! to its 2nd edition. MathJump! version 2.0 provides 1) questions simulating typical Math Kangaroo contest questions for grades 1-4, 2) past Math Kangaroo test papers for all grades, 3) practice questions to enhance students' basic math skills, 4) video solutions to some challenging Math Kangaroo questions, and 5) access to online tutor help. Only simulated contest questions and practice questions are available for iPhone version, due to Apple's restriction of iPhone app for small kids. But the Android version has all the other content.