Multi-purpose exercise book is a net exercise that includes writing, painting as a whole,A rub on the clean.
Multi-purpose exercise book with the following characteristics:
1. Write any painting, wipe it with a wipes or a damp cloth
2. Automatic elimination,all the word that written by the us can disappear automatically with not rub.
3. own pen water stained clothes, hands with water decomposition
4. Calculate painting and practice writing, can be used repeatedly