Baby can't stop cracking up while learning alphabet with dad

A baby's contagious laughter is getting love from millions.

Winston Thomas Moore was filmed by his mom, Kiara, as he practiced learning letters with his father, Pedro Moore. The 1-year-old couldn't stop giggling as his dad showed him the letter "W" could also be an "M" upside down.

Last week, Moore shared the sweet footage on Instagram, where it was viewed 30,000 times. Over 1 million more watched after actress Jennifer Garner posted it as well.

"That was the first time he laughed to that extreme," Moore of Middletown, Delaware, told "Good Morning America. "He's very enjoyable, likes to be silly, loves to learn. He's like a sponge when it comes to learning and anything that involved fun, he's down for."

Moore said Winston is his and his wife's "miracle baby" since the couple had been trying to have children for five years. Winston's adventures are now documented on the toddler's own Instagram's page, @winstontmoore.