K\'NEX k'nex 51438 typhoon frenzy roller coaster building set building kit , gray

BUILD A 19FT LONG ROLLERCOASTER: With over 640 pieces including rods, connectors, 19 ft of track, motorised power and a silver coaster car, this awesome building set lets you create a cyclone of twisting roller coaster fun in your living room | EASY TO BUILD 2-IN-1 MODEL: Discover non-stop action with this toy building set and download the exclusive instructions to build an incredible second model, the Tsunami Surge Coaster. With 2 models to build, kids and adults alike will enjoy hours of fun | EDUCATIONAL TOY: This construction set helps strengthen fine motor skills, logical thinking and problem solving. Perfect for capturing kids interest in basic construction, science and design, while promoting concentration and logical thinking | TOYS FOR 9 YEAR OLDS +: Ideal for encouraging young children to build and create while developing an understanding of STEM subjects, these kids building sets are great for children aged 9 and up | IDEAL GIFT FOR CHILDREN AND ADULTS: A great birthday gift or Christmas present for everybody. This amusement park set is a great gift for children looking for new challenges. This 19 foot long roller coaster building set for kids opens the door for hours of creative design play

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