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Three minutes is the best timing to brush your teeth. However, people get bored of those three minutes and stop brushing their teeth. Chi ka chi ka creates fun time by game for those people who get bored with three minutes. So Chi ka chi ka can make three minutes fun not getting bored. And then the time started on the tick behind the tooth brush while brushing your teeth. The germs are going to appear and disappear after brushing your teeth for three minutes. People will be feeling freshness in their mouth by killing all those germs.
Sejong Univ.
Seoul, South Korea
Samsung Design Membership
Seoul, South Korea