The following video is 19 seconds in duration, but it will put a smile on your face for the next 19 hours.
It features a three-month old boy hearing a (fake) lion roar for the first time, courtesy of his mother and a children's book, and initially reacting with fear and confusion.
But once the sounds ends and he realizes he's safe? We're treated to the magical sound of pure baby laughter. Is there anything better in the whole wide world?
Child Reacts to Fake Lion Roar
It's been a wonderful week overall for children reacting in adorable ways, from this toddler dancing to Katy Perry to this bathing baby cracking up over a puppy.
Relive some memorably adorable kid reactions now:
What happens when parents tell their daughter the family is going to Disneyland? An awesomely adorable reaction.
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