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Arithmetic bottle caps solve the problem of preschool education in Africa in a low cost and environmentally friendly way. It can not only be used as a teaching aid, but also a toy for children's entertaining, while solving the problem of lack of teaching aids and toys in poor areas. The bottle cap contains symbols from 0 to 9 and basic operations, which meets the learning requirements of basic arithmetic. The well-designed yellow-blue contrasting color scheme improves children's identification and memory efficiency of symbols, and promotes children's visual development.
Beijing University of Posts and
Beijing University of Posts and Telecommunications