Build an atomically cool coaster with dueling action with this KNEX Building Set - Atomic Coaster! Use over 850 K'NEX pieces to create a thrilling roller coaster building experience. K Nex atomic coaster with motor set.
We originally saw this at a friends house and my 8 year old son thought it was lots of fun. He needed lots of help to put it together and his dad did most of the work. But he really enjoys racing the cars. I doubt we would pull it apart and try a different configuration. A good purchase and lots of fun. Seller delivered package quickly and despite being a used item all the pieces were included. Happy buyer.