This is a 3d printer Dino Rib Cage for your Hot Wheels cars to run thru. Brings the fun to a whole new level.
This is a new 3d printed model.  As a 3d printed model please supervise young children with it at all times. 

Get the Skull Track piece here
https://www.ebay.com/itm/355074475273?hash=item52ac168509:g:c0IAAOSwqu1lGfpk

See the Brio Train compatible here
https://www.ebay.com/itm/355069641950?hash=item52abccc4de:g:s78AAOSwX2VlF3Ln