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Children mostly have the problem of holding bladders for several reasons. This may easily lead to disease and effect on their health. To encourage children going to bathroom, there must be something fun in it. Happee is a simple projector that shows an image of a plant. By the time one uses the toilet, the plant will grow bigger. Finally, it will blossom into different flowers which attract children to come to the bathroom again and again.
National Taipei University of