Through organ donation, the baby boy saved three lives.

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One of the children who received a donation was Jordan Drake. Drake, who was 18 months old when she received Lukas Clark's heart, is thriving today because of the donation.

Heather Clark made contact with Drake's family in November. She wrote about it on Facebook and posted a picture of Drake.

As the meeting approached, Clark posted on social media again:

"One week from today I will be listening to Lukas' heartbeat once again. I will be holding Jordan in my arms, showering her with love and kisses!"

Clark met Drake and her mother, Esther Gonzalez, for the first time on Friday. She was able to hear her son’s heart beating in Drake's chest.

A photo of the interaction shows Clark crying as she holds a stethoscope to Drake's chest. Gonzalez can also be seen tearing up.

"I'm not going to say anything. I'm just going to hug her," Gonzalez told KTLA before the meeting. "I think I have run out of words at this point."

Although Clark had been sending Drake gifts for months, the 4-year-old girl gave her a special gift when they met -- a Build-A-Bear with a recording of Lukas' heartbeat inside.