Kyocera and Lion as a part of Sony Startup Acceleration Program (SSAP) has developed 'Possi,' next-gen musical toothbrush that is designed to help parents by making tooth brushing enjoyable and fun for children. It uses Kyocera's proprietary ceramic piezoelectric element inside the head of the toothbrush that turns electric signals into vibrations to transmit music directly to the user without the use of external speakers. https://www.youtube.com/watch?v=C5HxqFpzVdA Kyocera's small ceramic piezoelectric element and digital-driven amplifier mounted on the body cause the toothbrush head to vibrate, allowing the child to hear and enjoy music only when brush head is in contact with the child's teeth or the inside of the mouth. Parents can play their own music by connecting a smartphone or any other device with a 3.5mm audio jack using the audio cable. It comes in round shape and candy-colored design appeal to children. It uses couple of AA batteries that promises one month of battery life based on 2 minutes of brushing twice a day. The Possi toothbrush is available for order in Japan at 14,800 yen (US$ 137 / Rs. 9,465 approx.) through First Flight, Sony's crowdfunding and e-commerce website. This includes three additional replacement heads for the brush, but shipments will begin only in March 2020. Source