Rolly Toys Halfpipe Dump Trailer Joskin It is stable because it has 2 wheel axles. Fits any Rolly Toys vehicle. The toy has: a double axle for stability, the trailer lifting mechanism makes it easy to dump the load. Rolly Toys is a German company founded in 1938 by Franz and Rosa Schneider. Today, after more than 75 years, the family business is still run by the second and third generations with no less commitment. Since its inception, Rolly Toys' goal has been to bring joy to children and parents around the world through the highest quality children's toys.