Underneath the Hot Wheels City live the Mutant Machines. The result of a failed lab experiment, these half-creature, half-vehicle machines lurk underground waiting for their chance to take over the world! The Mutants dont drive -- they bend, connect, slither and stretch with unique movement and styling. The vehicles wiggle motion is due to its animal-like spine, and each can connect at the front and back to other cars to create a long Mutant Machine train. These vehicles have a life of their own and allow for enhanced storytelling and push-around play. For new, imaginative, underworld play possibilities get the whole fleet (each sold separately). Features:The result of a failed lab experiment, these half-creature, half-vehicle machines lurk underground waiting for their chance to take over the world!