Is this a real Uno game or just toys?

It is a countdown calendar with Uno-themed toys and small gifts behind 24 doors. It is not a full playable Uno deck, so keep a regular deck for game night.

Mattel lists it for ages 7 and up. The small pieces make it unsuitable for younger children, especially those who still put things in their mouths.

Can the doors be closed again?

The doors are simple punch-out cardboard and are not designed to reseal. Once a day is opened, the calendar is mostly spent.

It stands about 4 inches tall and weighs around 7 ounces, so it fits on a shelf or desk without much space.

Is it worth it compared with a chocolate calendar?

It depends on whether the recipient plays Uno. The contents last past December, but you get novelty items rather than a full game, so a chocolate calendar is simpler for casual buyers.