It designed for 8 to 12 year old students or students already have one year scratch experienced. By Tr.KaiKai 如果對這個專案設計有興趣的同學，凱開老師會Hahow學習平台上開這個專案的架構以及如何設計的教學課程，敬啟期待。
Copy from windows abacus. Try to use scratch model simulation simple function. Some icons is from Flaticon and useing brush create other icons.
