The sound comes from the Leapster Explorer, the touchscreen handheld learning system released by LeapFrog as the successor to the original Leapster line. Its USB connection chime played when the device was linked to a computer for syncing content and managing games, a routine moment many owners heard repeatedly. As clips from older handhelds began circulating on soundboards, that tiny confirmation tone was saved on its own and reused outside its original context. It remains popular because its meaning is clear without words, nostalgia and all, in under a second.