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).