One Little Spark is the song used in the classic Journey into Imagination ride at Epcot Center. Although not quite as evil as It's A Small World, it will still end up stuck in your head for days.
While the other Epcot Future World pavilions are dedicated to concrete ideas (the ocean, energy, transportation, etc.), this one is all about the abstract world of the human imagination. Guests on the Journey Into Imagination ride are first greeted by the Dreamfinder, an old wizard:
One little spark of inspiration,
Is at the heart of all creation.
As if to prove his point, he then uses his own thoughts to create Figment, the ride's loveable purple dragon. The two of them then explore all the ways that the imagination can inspire creativity.
A dream can be a dream come true,
With just that spark in me and you.
Lyrics and music by Richard M. Sherman and Robert B. Sherman.