A perfect activity for the whole family. Designed to be fun, safe, and offer exceptional play value, these creative building sets are sure to bring out the creativity in kids of all ages. Start off by building a crazy, cranking, wacky machine using this 175-piece set to include 16 large gears and plans to build 7 wacky machines. Continue on with this Kinetic Sand. Kinetic is an easy-to-shape sand that moves and flows, one touch and your family will be mesmerized! Take all this new found knowledge and fun and enjoy a one year membership to the National Building Museum where you can find something for every member! See architectural elements, exquisite drawings, rare photos, fragment from landmark buildings, and plenty of fun.