Not for the first time, I saw trains in Switzerland with cartoons on the side, with one holding a board: "Magic Ticket - Ticki Park". I'm used to trains being covered in advertising, so I'm thinking "OK, this is advertising for a children's amusement park somewhere in Switzerland, and if they've got carriage-side ads on several trains, they must be big". So I looked it up.
Ticki Park is inside the train.
The Swiss state railway company known as SBB in German, CFF in French, and, yes, FFS in Italian, has child-friendly family spaces on their InterCity trains, indicated by these jolly characters. Double-decker trains, namely IC2000 push-pull carriage sets and RABe 502 Twindexx EMUs, have a small playground inside - some decoration is just visible through the window at the top-right of the above picture.
Single-deck trains like the RABe 501 Giruno don't have such extravagant facilities, but the family spaces are still indicated outside by adorable cartoons, as seen above. When the door opens, it slides to the left and the cat gets closer to the Saint Bernard!
So there we have it. Playing areas aren't new on trains (the French put some in their Corail cars in the 80s, there's JR Kyushu's express Aso Boy! in operation today, not to mention several Japanese Joyful Trains based around children's media like Anpanman or Pokémon also feature them), but I've only seen family spaces like this in regular and widespread service, and with such theming in the livery, in Switzerland.