The Mutant Machines™ are uniquely special vehicles that live underneath the Hot Wheels® City and, unlike every other car on the road or track, don't just drive - they bend, slither, wiggle and stretch. The reconfigurable 3-in-1 Slither Slide™ track set shows off their awesome performance! Boys can navigate three different rocky, bumpy, curvy, fun terrains with this track set. They also have two play choices: to set them up end to end as a long diverse track or side by side for three lanes of racing fun! The best part of all is this track set connects to the Mutation Lab™ play set for more Mutant experimentation, as well as to other Hot Wheels® sets so kids can build out their entire Hot Wheels® systems and create a world of Hot Wheels® City. Includes one Mutant Machine™ vehicle. (Additional tracks and play sets sold separately).