Seth Lane is a 5-year-old from Northamptonshire, England, and he's absolutely adorable.
He also has severe combined immunodeficiency (SCID), which means he has to live in a special cleanroom. He's known to some as a "Bubble Boy."
Seth needs a second bone marrow transplant and so his parents came up with a great way for people to show their support for this young'un!
His mom posted on her blog:
Tags: adorable, anglophilia, boy, bubble boy, bubble boy seth lane, cute bubble boy, cute kids, cutest, england, health, parents, rare, sick, special, support, wear yellow bubble boy, wear yellow for seth, wearyellowforseth, young