Kiri and Lou Go Raaa! arrives at an odd cultural moment for children's animation — a landscape dominated by franchise IP, algorithmic sequels, and prestige TV that mistakes length for ambition. This 60-minute stop-motion film from New Zealand does the opposite: it earns every minute, and it knows exactly who it's for. For the uninitiated, Kiri is an energetic yellow dinosaur and Lou is a gentle purple palorcheste — a fictional creature vaguely modelled on the prehistoric palorchestes, itself something like a giant tapir. Their CBeebies series runs in 5-minute episodes, so the feature film is genuinely ambitious in scope for this audience. Writer-director Harry Sinclair (also the TV series' writer, alongside Rebecca Kirshner of Buffy the Vampire Slayer) structures the film as an origin story: how did these two temperamentally mismatched creatures become best friends? It's a question that functions equally well as an entry point for newcomers and a reward for existing fans. The stop-motion animation, co-directed by Anthony Elworthy — whose credits include The Boxtrolls, My Life as a Courgette, and Kubo and the Two Strings — is the film's most immediately obvious strength. The usual critical move here is to praise the visible fingerprints in the modelling clay as a proxy for 'effort' and leave it at that. But the tactile quality does real narrative work: when Kiri and Lou face peril — a rising sea, a 'smoky mountain' — there's a physical weight to the danger that digital animation struggles to approximate. These are objects that exist in a world with gravity and consequence. That feeling is not incidental to the storytelling; it is the storytelling. The voice cast is quietly remarkable for a children's film. Olivia Tennet (Freda in The Lord of the Rings: The Two Towers) brings Kiri's energy without tipping into shrillness — a harder task than it sounds. Jemaine Clement, of Flight of the Conchords, does what Clement always does: occupies a register that is simultaneously gentle and deadpan and slightly melancholy in a way that is completely disarming for adults sitting through their fourth viewing. The songs, from Don McGlashan (Blam Blam Blam, The Front Lawn), are dreamy enough that the film would, as the review notes, work as an audiobook — which is a real compliment for a visual medium. Sinclair's economy of storytelling is the thing worth foregrounding. One hour is the right length for this film. There is no bloat, no franchise setup, no mid-credits tease. It arrives, it does its thing, it ends. Adults who have recently sat through a 150-minute superhero film in which nothing happens for 45 minutes will find this quietly devastating in the best way. The discipline required to tell a complete, emotionally satisfying story in 60 minutes for a two-year-old is not a lesser skill than writing adult drama — it is a different and arguably harder one. Kiri and Lou Go Raaa! is in UK cinemas from 16 October.