Quriflasko

A bright field guide for children who want to see what one change can do. Each trail starts with a prediction. Then a single condition moves: crates on a little skiff, the width of a paper wing, sips of water for a sprout, the steepness of a ramp, the angle of a lamp, clips on a balloon string, books on a paper span, the length of a swinging string, or the reach of a magnet. Early trails are one clear comparison. Later trails ask for three written results and a simple order from smallest to largest. A missed guess still finishes the trail, and the next bench opens. Beside the trails are a notebook of observations, a coach that keeps extra factors locked, an atlas for sorting and comparing saved results, illustrated cause cards with a single dial, story stations, written lab sheets, and a plain-language word bench.