or kept in the box for display purposes if you're so inclined

includes a mechanical action spring that can drive the foam ball at a speed of up to 100 kilometres per hour

Capture bad guys in the removable cage

Because it's so simple

Polly doll is taking some time to unwind and rest

K'nex Stem Explorations Roller Coaster Building Set Gift LEGO Batman or kept in the boxLooking for a brilliant way to blend playtime with learning? As a busy parent, you'll love how this K'NEX STEM Explorations Roller Coaster Building Set delivers endless entertainment whilst sneakily teaching your kids valuable skills. With over 500 pieces and a battery powered motor, your little engineers can construct a working roller coaster that'll have them squealing with delight. Perfect for those rainy Manchester afternoons or home learning