A free program for Android, by EvelynSHallApps.
This app is a free coloring book for all ages. It's a very useful app to develop your imagination and creativity as well as to increase your level of concentration! It has a lot of cute colors and is very easy to use. You will find characters from Rainbow Monster in it.
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You just have to select one of the categories and then choose one of the characters. You can also save your work or share it with your friends. The app is free to download on all compatible Android devices.
