The short melody, 2:57, which creates the impression not pretty, but a little bit sad. Then it changed for the better, but still, it is far from the fun. It remains at the level of mild nostalgia, which then becomes the expectation of something new and pleasant. Even if it will be just a new carton of milk. This is the classical genre. In the end notes of the thermenvox slips, or it may be voice, depicting a spooky ghost.
Reference: DeVotchKa's Nick Urata breathes musical life into the film 'Paddington' - Read on CPR.org