The Bucket List Family, who have a popular Youtube channel, uploaded a video of their dive with great white sharks off the coast of Baja California, in western Mexico.
Parents Garrett and Jessica were happy for their daughter Dorothy, seven, and son Manilla, five, to step into the shark cage.
The children go through the requirements beforehand, taking a safety briefing and signing a waiver.
“I was a little bit scared,” Dorothy said in a post-shoot interview. “But then I was brave.”