Color sensor detects red, blue, or green marbles and sends the corresponding signal – for intelligent route extensions and clever combinations Take your first steps in coding: The Color Detector reaches its full potential when combined with other electronic GraviTrax elements that communicate via radio. GraviTrax is the flexibly expandable marble run for kids aged 8 and up. This element must be combined with a starter set or other electronic elements. GraviTrax can be used to create entire marble run worlds. PRO elements add smart functions and new building ideas to existing tracks. Meaningful activity for kids aged 8 and up, great gift for boys and girls aged 8 and up, Christmas gift, birthday gift, or Easter gift
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