3-year-old Rhett Flener stars in this adorable video that's been viewed more than 70 million times on Facebook.

Rhett's pure joy over his birthday cake and candles is infectious and Rhett's mother says that many people have sent messages to them telling them how happy the video made them. 

"Obviously you think your own child is the cutest and maybe some family members will think what they do is cute as well," Flener said. "I think people love this video so much because when watching his joy and pure happiness you can't help but feel those same emotions."

Lee Ann Flener, Rhett's mom, shared the video with "Good Morning America."

Flener says that Rhett was born on New Year's Day, enjoys Sesame Street, shouting at Alexa to turn the music on, copying his big brother Warren and holding his new baby brother, Brooks. His favorite color is purple.

The video has struck a chord with so many that Flener calls it a "reminder" to let the negativity in the world go.

"We all need to focus on the little things that bring that joy and happiness, such as something simple like a happy birthday song," she said. "We also want to show the world that regardless if you have a typical child or a child with Down syndrome, the every day things you do with them are so special and rewarding," Rhett's mom Lee Ann Flener said. 

Original story posted on Facebook/ABC News By Genevieve Shaw Brown.