The world in one breath
Behind the door lie the Gallopwilds — the wide, weathery, hill-rolling country where every gallop in every story was first run. The wild unicorns live here still, travelling in strings, and once a year they run the Rainbow Run: the headlong dash from the Wildmeadow to Skyleap Hill that paints the year’s rainbows. Because rainbows don’t appear. They’re run. And this year the Run can’t start: the Great Blow, the wildest gale in four hundred years, tore the course’s five Hoofbeats out of the ground and scattered them across the whole country. No beats, no Run. No Run, no rainbows all year. Tanglemane, the storm-running unicorn who leads the Run, has tried setting them back herself; every attempt ended two valleys past where she meant to stop. She has never once stopped on time, and does not consider this a problem. Your child is the hero the way-notes prophesy. Their friends are the crew. And the course isn’t going to re-blaze itself.
What the party actually does
They step onto the Gallop on a rush of moving air and shout the wild ones’ first word to wake the way. They learn the Gallop Call. They follow the Outpacer’s way-notes through the Wildmeadow and the Windbreak — your rooms, re-blazed by the map — and cross the Puddlemoors, where no puddle has ever once been jumped over. (Nobody rides, by the way — you run WITH the wild ones, never on them.) They find the five Hoofbeats one by one, and every find is a beat of the Run performed with body and voice — knees drummed like far-off hooves here, one huge all-together stamp-splash there, and two or three we’re not going to spoil, because one of them is the funny one and one is saved for the end. They unroll the Rainbow’s Landing — the meadow where last year’s rainbow came down, every blade of grass still striped — long as a hero lying down (maybe longer; depends on the hero). And at the end, on Skyleap Hill, all together, they shout the one word the Run starts on — and their voices become the starting-gun of the year: the whole wild string surging past, and the first rainbow landing long and low across wet grass. Then: feast (every Run in four hundred years has ended at a table — it’s what finish lines are for), cake, and a ceremony where the birthday child is named Rainbow-Runner of the Gallopwilds and awards every single friend.
Two versions, one world
Five to seven get one trail run all together, picture-rhyme clues, wind-knots tying the trail shut, and the Run’s word taught aloud; eight to eleven get role teams on parallel way-note trails, Ribbonscript (the wild ones write by galloping — decoding is tracing the loop until the letter appears under your finger), the Weatherglass cipher, and a ten-glyph puzzle nobody can finish alone. Both end the same way: the Run run, one child crowned, and a very fast, very muddy, completely unembarrassable unicorn measuring everyone’s praise in valleys.