Little Einsteins is a children's television show that aired on Playhouse Disney (now Disney Junior) that was created by Disney and The Baby Einstein Company. But long before its debut, an early preview of the show appeared on the previews for the Baby Einstein DVD Baby Santa's Music Box.
This is said to be extremely rare to find and a video of this has not surfaced, though footage once appeared on a defunct Disney wiki page.
Extremely Rare Little Einstein Early Preview