Establish the water purification habits of African children and make water filtration a fun thing! 1. Successfully attract children's attention By playing music, children are attracted to establish the habit of water purification, making water filtration a fun and proactive thing to do. 2. Large filtration capacity A family in Africa (4 people) needs about 5-8 liters of water a day. Children can filter 7 liters of water by playing Maji Box once. 3. The price is affordable and reusable, using both replaceable carbon and hollow fibers-nano silver technologies. Allow users to buy cheaply and reuse it many times.