Even before the title flashes up for Venice Film Festival competition entry L’Immensita, we know that Penelope Cruz is the most fun mom – most likely the only fun mom – in town. She doesn’t just set the table for dinner; she puts on music, leads the kids in a choreographed dance and singalong as they pass plates and cutlery, emoting into a passing fork as if it were a microphone. Adults bore her. At a birthday dinner for an ancient relative, she slips under the table to join her children in removing and mixing up everyone’s shoes. “I want to play!” she says, eyes gleaming.