From the campaign page:
The Cyclone is a block based (LEGO® , Kre-o, Mega Bloks, etc.) roller coaster construction toy. It will be the first commercially available kit that combines the versatility of the world's leading building block system with the realism and excitement of the CoasterDynamix track system. The result is an amazing roller coaster model that is easy to build and fun to customize. Join multiple sets together to make larger, more elaborate custom designs.The possibilities are endless!
Go to the CoasterDynamix Cyclone Kickstarter project.