Leave it up to a child to remind us to be thankful for a natural ability most of us take for granted: A 3-year-old’s priceless face was captured on video as he reacted to hearing his father’s voice for the first time. Thanks to a microchip that University of North Carolina doctors implanted inside the child’s brain, Grayson Clamp–who was born deaf–was finally able to hear his father say “Daddy loves you.” He is the first child in the U.S. to receive the implant, which had previously only been approved for adults.

(MORE: WATCH: Father Hears Kidnapped Daughter’s Voice After 3 Years)

As explained by Dr. Sanjay Gupta in the CNN video above, the young boy received the auditory brain stem implant as part of an ongoing Food and Drug Administration (FDA) trial. This was the second attempt at restoring Clamp’s hearing: Doctors had previously performed a standard cochlear implant, a…

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