Tell the cat how much money to add to your pocket. Make the program keep track of the total and the answers.
Project Lead The Way is a non-profit organization offering curriculum and professional development to U.S. schools. CSE is our new computer science course for high schools. CSE students create programs in many languages, including Scratch, MIT App Inventor, and Python. See http://www.pltw.org/our-programs/computer-science for details.