A toddler whose hearing has been progressively deteriorating since birth squealed with joy the moment he heard his mum's voice properly.
Kaiden Orantes, from New Jersey, was filmed as he was fitted with hearing aids by his doctor.
As soon as the two-year-old's mum said "Hi", he looked at her in shock then proceeded to happily dance around the entire room.
Now if that doesn't put a smile on your face, we don't know what will.