By Debbie Emery - Breaking Celebrity News Reporter

A set of primordial dwarf siblings are proving that good things do come in small packages.

Dubbed the world's smallest siblings, Bri, 23, and Brad Jordan, 21, appeared on Anderson Cooper's talk show in an episode that will air on Friday to reveal what life is like when everyone you meet towers above you.

Brad, who weighs in at just 38 pounds and is 38 inches tall, told Cooper that the biggest challenges they face are "going grocery shopping because we can't reach stuff on the top shelf, and driving."

The brother and sister have osteodisplastic dwarfism type 2, which is extremely rare with only 100 cases recorded in history, according to their mother, Christy Jordan.

"We just have people stare a lot," revealed Brad, one of the stars of TLC's Big Tiny.

His older sister, 18-pound and 27 inch tall Bri went on to explain: "We just do everything we want, we don't think about it that much.

"We try to get across that all people are different and there's a lot of issues and different types… all dwarfs are different, we try to bring that out that anybody has dwarfs or big people because we have so much different experience than other people," said the plucky girl from Sandoval, Illinois.