A calendar that goes on forever (literally) and an organiser that works as the perfect buddy for your childs school desk Thats Smartivity Infinity Calendar STEAM Educational Construction kit for you! Once assembled, Smartivity Infinity Calendar features two cool rotator mechanisms to change date and month by simply turning a knob. Smartivity Infinity Calendar introduces your child to the concepts of gear mechanisms and the dates flip automatically based on gravity. Smartivity Infinity Calendar STEAM Educational Construction kit comes with all the parts and a step-by-step instruction manual needed to assemble a fully-functional infinity calendar and desk organiser. Why change calendars every year when you can make one that will last for ever and ever and ever.