multiples of 45 degrees. The second method is to snap the rod into one of the connector slots perpendicular to first method. The rods cannot rotate and will not move without deliberate force. The third way is to slip the rod through a round hole in the connector. The rod can slide and rotate freely while in the hole. K'Nex bricks were added to K'Nex sets in 2008 as part of the 15th anniversary of the brand. Consisting of post-and-stud connecting blocks and plates similar to Lego and other compatible brands, K'Nex blocks also have holes between the studs where K'Nex rods can be inserted. There are several other K'Nex pieces, such as wheels, pulleys, and other simple machines. There are also various motors that can make the models move. Use K'Nex can be used to construct innumerable creations because many different pieces can interlock at different angles and directions. From miniature cows to complete table sets to roller coasters, many objects and contraptions in various sizes can be constructed. Because K'Nex pieces are made of a strong plastic and interlock, these constructs are usually quite sturdy. Many hobbyists have included low-power servo motors and wheels other than K'Nex in their constructions. Even real bikes (complete with bicycle wheels) have been constructed with K'Nex. Educational products While all K'Nex building sets are educational, the company also carries a line of products that are targeted for use in the classroom. This includes building sets for creating DNA models, simple machines and geometry tools, among many other items. These sets are presumably designed for preschool to high school-aged students. Display models and exhibits Concordia University's Engineering and Computer Science Association (ECA) has erected models of a Space Shuttle, the Sears Tower, the Eiffel Tower, Habitat 67, and mazes out of K'Nex. The U.S. Space and Rocket Center held a Guinness Book of World Records Award for the "World's Largest K'Nex Sculpture" and also has a huge space shuttle and rocket in their gift shop in Huntsville, Alabama. The Guinness World Record for "World's Largest K'Nex Sculpture" was broken in 2014 by a team in the UK with a 13.38-meter long K'Nex replica of the BLOODHOUND 1600 km\h Supersonic Car. K'Nex also has a traveling exhibit, K'Nex: Build Thrill Rides, that visits school and museums across the country. Computer game A computer game, K'NEX The Lost Mines: Adventure Begins, was released in 1998