The Fold Up Track Pack is part of the BUILD category and helps kids create unique tracks with 12 feet of straight track and 5 hinge connectors and additional basic track connectors. The hinge connectors flex both ways and let kids 'fold up' their track without taking it apart for easy track building and clean up The Fold Up Track Pack is one of 7 different component packs that let kids BUILD, STUNT, and BOOST. The BUILD category enables kids to create dynamic track paths in their Track Builder world. Connects to other Hot Wheels sets (sold separately) for infinite possibilities. Add to other packs in the STUNT and BOOST categories for even more fun or add this stunt to Multi-Lane Speed Box or Triple Loop Kit (sold separately). Great gift idea for ages 6 to 10 years old.